{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9853844","patent":{"patent_number":"US-9853844","title":"Circuits and methods for frequency offset estimation in FSK communications","assignee":null,"inventors":[],"filing_date":"2017-07-21T00:00:00.000Z","publication_date":"2017-12-26T00:00:00.000Z","cpc_codes":["H04L","H04L"],"num_claims":20,"abstract":"Disclosed embodiments include a receiver having an input that receives a frequency shift key (FSK) signal having a preamble comprising preamble symbols, a phase compensator that applies a compensation vector to one of first and second samples of a first preamble symbol, wherein applying the compensation vector to the one of the first and second samples produces a compensated sample, a demodulator that determines a phase offset between the compensated sample and the other one of the first and second samples of the first preamble symbol, and a frequency offset mapper that determines a frequency offset based at least upon the phase offset. The receiver applies the frequency offset to the FSK signal."},"analysis":{"summary":"The Circuits and Methods for Frequency Offset Estimation in Fsk Communications patent introduces a novel approach to mitigate the adverse effects of frequency offsets in Frequency Shift Keying (FSK) communication systems. The core innovation lies in employing a phase compensator to apply a compensation vector to samples of the preamble symbol, followed by a demodulator that determines the phase offset. This information is then used by a frequency offset mapper to estimate the frequency offset, which is subsequently applied to the FSK signal.\n\nFrequency offsets are a significant challenge in FSK systems, leading to signal degradation and reduced communication reliability. Traditional methods for addressing this issue often involve complex algorithms and substantial computational overhead, making them impractical for resource-constrained devices. The Circuits and Methods for Frequency Offset Estimation in Fsk Communications patent provides a streamlined and efficient solution that reduces computational burden and allows for more effective hardware implementation.\n\nThe key technical approach involves leveraging the preamble symbols of the FSK signal to estimate the frequency offset. By compensating for phase variations early in the demodulation process, the system can more accurately determine the frequency offset. This approach simplifies the process and enables more efficient hardware implementation and reduced computational overhead.\n\nThe business value of this innovation lies in its ability to enhance the reliability and performance of FSK communication systems. By accurately estimating and compensating for frequency offsets, this technology can facilitate the deployment of FSK-based systems in challenging environments, such as those with high levels of interference or significant frequency drift. This can open new opportunities for FSK in applications where it was previously considered unsuitable. The market opportunity includes wireless communication, IoT, and industrial automation.\n\nThis patent is set to improve FSK systems across numerous industries, with a high market adoption rate expected as the technology further develops.","layman_explanation":"The Circuits and Methods for Frequency Offset Estimation in Fsk Communications patent addresses a common problem in wireless communication systems that use Frequency Shift Keying (FSK). FSK is a method of transmitting digital data by changing the frequency of a carrier signal. Think of it like Morse code, but instead of short and long beeps, it uses slightly different radio frequencies to represent 0s and 1s.\n\n**1. What Problem Does This Solve?**\nIn the real world, wireless signals are often subject to various distortions and interferences. One common issue is frequency offset, which occurs when the transmitter and receiver are not perfectly synchronized in terms of frequency. This can be due to various factors such as component imperfections, temperature changes, or Doppler effects (like the change in pitch of a siren as it moves past you). Frequency offset can make it difficult for the receiver to correctly interpret the transmitted data, leading to errors and unreliable communication. Existing solutions often require complex and power-hungry signal processing techniques.\n\n**2. How Does It Work?**\nThe Circuits and Methods for Frequency Offset Estimation in Fsk Communications patent provides a clever solution that efficiently estimates and compensates for frequency offsets. It works by analyzing the 'preamble' of the FSK signal. The preamble is a known sequence of bits that is transmitted at the beginning of each message. The system uses a 'phase compensator' to adjust the signal and a 'demodulator' to measure the phase difference between different parts of the preamble. This phase difference is then used to estimate the frequency offset. Once the offset is known, it can be corrected, resulting in a cleaner and more accurate signal.\n\nImagine tuning a radio. If you're slightly off the correct frequency, the sound will be distorted. This patent is like an automatic tuner that constantly adjusts the radio to the correct frequency, ensuring clear reception.\n\n**3. Why Does This Matter?**\nThis innovation has significant implications for various industries. For example, in IoT (Internet of Things) devices, which often rely on low-power wireless communication, accurate frequency offset compensation can extend battery life and improve communication reliability. In industrial automation, where reliable data transmission is critical for controlling machinery and processes, this technology can reduce errors and improve efficiency. The market impact is substantial, as it enhances the performance of FSK-based systems across a wide range of applications.\n\n**4. What's Next?**\nThe future applications of this technology are promising. As the demand for wireless communication continues to grow, the need for efficient and reliable signal processing techniques will become even more critical. This patent lays the foundation for further advancements in FSK technology, potentially leading to higher data rates, longer communication ranges, and improved energy efficiency. The market adoption timeline will depend on the integration of this technology into existing and new FSK-based systems, but the potential ROI is significant for companies that embrace this innovation.","technical_analysis":"The Circuits and Methods for Frequency Offset Estimation in Fsk Communications patent presents a novel approach to address the problem of frequency offsets in Frequency Shift Keying (FSK) communication systems. The technical architecture revolves around a phase compensator, a demodulator, and a frequency offset mapper working in concert to accurately estimate and correct frequency offsets.\n\nThe system begins by receiving an FSK signal with a preamble comprising preamble symbols. The phase compensator applies a compensation vector to either the first or second sample of a first preamble symbol, producing a compensated sample. This compensation is crucial for mitigating phase variations caused by frequency offsets. The demodulator then determines the phase offset between the compensated sample and the other sample of the first preamble symbol. This phase offset provides a measure of the frequency deviation.\n\nThe frequency offset mapper uses the determined phase offset to estimate the frequency offset. This estimation is based on a predefined mapping function that relates the phase offset to the frequency offset. The estimated frequency offset is then applied to the FSK signal to correct for the frequency deviation. This correction improves the accuracy of the demodulation process and enhances the overall performance of the FSK system.\n\nFrom an implementation standpoint, the system can be realized using standard digital signal processing (DSP) techniques. The phase compensator can be implemented using complex multipliers, while the demodulator can be implemented using phase detectors or similar circuits. The frequency offset mapper can be implemented using a lookup table or a mathematical function. The choice of implementation depends on the specific performance requirements and available hardware resources.\n\nThe integration of this system into existing FSK receivers is relatively straightforward. The phase compensator, demodulator, and frequency offset mapper can be added as a front-end module to the receiver. The system can be configured to operate in real-time, continuously estimating and correcting for frequency offsets. This ensures that the FSK signal is always accurately demodulated, even in the presence of significant frequency drift.\n\nThe performance characteristics of the system depend on several factors, including the accuracy of the phase compensator, the sensitivity of the demodulator, and the precision of the frequency offset mapper. Careful design and optimization of these components are essential for achieving optimal performance. The system's performance can be further enhanced by using adaptive algorithms that adjust the compensation vector and mapping function based on the observed signal characteristics.","business_analysis":"The Circuits and Methods for Frequency Offset Estimation in Fsk Communications patent holds significant business potential due to its ability to improve the reliability and performance of Frequency Shift Keying (FSK) communication systems. The market opportunity for this technology spans various industries, including wireless communication, IoT, and industrial automation.\n\nThe market size for FSK-based communication systems is substantial. FSK is widely used in applications where simplicity and robustness are paramount, such as remote control systems, wireless sensors, and industrial control networks. The increasing demand for these applications is driving the growth of the FSK market. The Circuits and Methods for Frequency Offset Estimation in Fsk Communications patent can capitalize on this growth by providing a more reliable and efficient solution for frequency offset estimation.\n\nThe competitive advantages of this technology stem from its ability to accurately estimate and compensate for frequency offsets. Traditional methods for addressing this issue often involve complex algorithms and substantial computational overhead. The Circuits and Methods for Frequency Offset Estimation in Fsk Communications patent provides a streamlined and efficient solution that reduces computational burden and allows for more effective hardware implementation. This gives it a competitive edge over existing solutions.\n\nThe revenue potential for this technology is significant. It can be monetized through various business models, including licensing, product sales, and service offerings. Licensing the technology to FSK system manufacturers can generate a steady stream of revenue. Selling integrated circuits (ICs) incorporating the technology can also be a lucrative business model. Providing consulting services to help customers integrate the technology into their systems can further enhance revenue streams.\n\nFrom a strategic positioning perspective, the Circuits and Methods for Frequency Offset Estimation in Fsk Communications patent can be positioned as a key enabler for reliable and efficient FSK communication. This can attract customers who are looking for solutions to improve the performance of their FSK systems. The technology can also be positioned as a cost-effective alternative to traditional frequency offset estimation methods.\n\nThe ROI projections for this technology are promising. By improving the reliability and performance of FSK systems, it can help customers reduce data loss, improve communication range, and extend battery life. These benefits can translate to significant cost savings and increased revenue for customers. This makes the technology an attractive investment for companies looking to improve their bottom line.","faqs":null,"topics":["FSK communications","frequency offset estimation","signal processing","wireless communication","IoT"],"tech_cluster":null},"seo":{"title":"Circuits and Methods for Frequency Offset Estimation in Fsk Communications - Patent US-9853844","description":"Explore the Circuits and Methods for Frequency Offset Estimation in Fsk Communications patent for enhanced FSK signal processing. Accurate offset estimation, improved reliability. Learn more!","keywords":["FSK communications","frequency offset estimation","signal processing","wireless communication","IoT","phase compensator","demodulation","patent","patent US-9853844"]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9853844","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9853844","citation_suggestion":"Patentable. \"Circuits and methods for frequency offset estimation in FSK communications\" (US-9853844). https://patentable.app/patents/US-9853844","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9853844","json":"https://patentable.app/api/llm-context/US-9853844","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-30T13:40:57.574Z"}