{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9853751","patent":{"patent_number":"US-9853751","title":"Method of estimating the frequency response of multipath channels","assignee":null,"inventors":[],"filing_date":"2015-12-21T00:00:00.000Z","publication_date":"2017-12-26T00:00:00.000Z","cpc_codes":["H04B","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L","H04L"],"num_claims":8,"abstract":"In a digital communication system there is provided a method for OFDM channel estimation that jointly considers the effects of coarse timing error and multipath propagation. The method uses an iterative channel estimation technique, which considers the practical scenario of fractional timing error and non-sample space echo delays. The method does not require channel state information such as second-order statistic of the channel impulse responses or the noise power. Moreover, timing error can be conveniently obtained with the proposed technique. Simulation shows that, when comparing OFDM channel estimation techniques under DOCSIS 3.1 realistic channel conditions, the proposed algorithm significantly outperforms conventional methods."},"analysis":{"summary":"The Method of Estimating the Frequency Response of Multipath Channels patent presents an innovative iterative channel estimation technique designed for OFDM (Orthogonal Frequency-Division Multiplexing) systems. The core innovation lies in its ability to jointly address the challenges posed by coarse timing errors and multipath propagation, common impairments in digital communication environments. Traditional methods often struggle with fractional timing errors and non-sample space echo delays, leading to degraded performance. This patent overcomes these limitations by providing a more accurate and robust channel estimation algorithm that does not require channel state information, such as second-order statistics or noise power.\n\nThe problem being solved is the inaccurate channel estimation in OFDM systems due to timing errors and multipath propagation. These inaccuracies lead to reduced data throughput, increased error rates, and overall poor system performance. The invention's key technical approach involves an iterative process of estimating and correcting for timing errors and channel impulse responses, allowing the system to converge on a highly accurate channel estimate even in challenging environments.\n\nThe business value and applications of this technology are significant. By improving channel estimation accuracy, the Method of Estimating the Frequency Response of Multipath Channels can enhance the performance of a wide range of wireless communication systems, including those used in DOCSIS 3.1 environments. This translates to improved data throughput, reduced error rates, and enhanced user experiences for consumers. The market opportunity for this technology is substantial, as the demand for high-performance wireless communication continues to grow. Service providers can leverage this invention to deliver better services, reduce operational costs, and gain a competitive advantage.","layman_explanation":"The Method of Estimating the Frequency Response of Multipath Channels patent focuses on improving the reliability and speed of wireless communication. It addresses a common problem: signals bouncing off multiple objects (multipath) and arriving at different times, plus errors in timing that can garble the message. Think of it like trying to hear someone in a canyon where echoes make it hard to understand.\n\nThis patent offers a way to estimate and correct for these signal distortions. It's like having a smart filter that cleans up the echoes and aligns the timing so the message comes through clearly. The technology uses an iterative process, meaning it makes repeated adjustments to the signal until it's as clear as possible. Importantly, it does this without needing a lot of extra information about the environment, making it more practical for real-world use.\n\nWhy does this matter? Clearer signals mean faster data speeds, fewer dropped calls, and more reliable wireless connections. This technology has the potential to improve the performance of various communication systems, from home Wi-Fi to mobile networks. It gives companies a competitive advantage by offering better service quality and reducing operational costs. The ability to conveniently obtain timing error is a significant advantage, reducing operational costs. The investment implications are significant, as this technology can enhance the value of existing communication infrastructure and enable new applications.\n\nLooking ahead, this technology could be further developed to improve the performance of emerging wireless technologies like 5G and beyond. As wireless communication becomes increasingly important, solutions like this will be essential for ensuring reliable and high-speed connectivity.","technical_analysis":"The Method of Estimating the Frequency Response of Multipath Channels patent details an iterative algorithm for OFDM channel estimation that addresses the limitations of existing methods in dealing with coarse timing errors and multipath propagation. The technical architecture involves several key components: timing error estimation, channel impulse response estimation, fractional delay filtering, and an iterative refinement loop. The algorithm operates by first estimating the timing error based on the received signal. This is achieved by analyzing the correlation between the received signal and a known training sequence. The estimated timing error is then used to compensate for the effects of timing misalignment. Next, the channel impulse response is estimated using a least-squares approach. This involves solving a system of linear equations to determine the channel coefficients. The estimated channel impulse response is then used to compensate for the effects of multipath propagation. A key aspect of the algorithm is the use of fractional delay filtering to handle non-sample space echo delays. This involves designing a filter that can introduce a fractional delay to the received signal, allowing for precise compensation of echo delays. The algorithm then iteratively refines the channel estimate by repeating the timing error estimation, channel impulse response estimation, and fractional delay filtering steps. Each iteration improves the accuracy of the channel estimate, leading to better overall system performance. \n\nThe implementation details of the algorithm involve careful consideration of computational complexity and memory requirements. The algorithm is designed to be computationally efficient, allowing for real-time implementation in high-performance communication systems. The integration patterns involve seamless integration with existing OFDM transceivers. The algorithm can be implemented as a software module or as a hardware component, depending on the specific requirements of the system. Performance characteristics of the algorithm have been evaluated through simulations under realistic channel conditions. The results demonstrate that the algorithm significantly outperforms conventional methods in terms of channel estimation accuracy, data throughput, and error rate. Code-level implications involve careful optimization of the algorithm to minimize computational complexity and memory requirements. This includes the use of efficient data structures and algorithms, as well as careful optimization of the code for specific hardware platforms.","business_analysis":"The Method of Estimating the Frequency Response of Multipath Channels patent presents a significant business opportunity in the rapidly growing market for high-performance wireless communication systems. The market opportunity size is substantial, driven by the increasing demand for faster data rates, lower latency, and more reliable connections. The competitive advantages of this technology include improved channel estimation accuracy, reduced error rates, and enhanced overall system performance. These advantages translate to improved user experiences, reduced operational costs, and increased revenue potential for service providers. The revenue potential for this technology is significant, driven by the potential to improve the performance of a wide range of wireless communication systems. This includes applications in DOCSIS 3.1 environments, as well as emerging applications such as 5G and beyond. \n\nPotential business models for this technology include licensing the patent to equipment manufacturers, integrating the technology into existing communication systems, and developing new communication systems based on the patented technology. The strategic positioning of this technology is strong, as it addresses a critical need in the market for high-performance wireless communication systems. The ROI projections for this technology are favorable, driven by the potential to improve data throughput, reduce error rates, and enhance overall system performance. The ability to conveniently obtain timing error is a significant advantage, reducing operational costs. This technology has the potential to generate significant returns for investors and stakeholders.","faqs":null,"topics":["OFDM channel estimation","multipath propagation","timing error correction","fractional timing error","DOCSIS 3.1"],"tech_cluster":null},"seo":{"title":"Method of Estimating the Frequency Response of Multipath Channels - Patent US-9853751","description":"Discover a new method for OFDM channel estimation that jointly considers timing error and multipath propagation. Full patent analysis, claims, and technical details.","keywords":["OFDM channel estimation","multipath propagation","timing error correction","fractional timing error","DOCSIS 3.1","wireless communication","signal processing","patent","patent US-9853751"]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9853751","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-9853751","citation_suggestion":"Patentable. \"Method of estimating the frequency response of multipath channels\" (US-9853751). https://patentable.app/patents/US-9853751","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9853751","json":"https://patentable.app/api/llm-context/US-9853751","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T05:33:08.301Z"}