Wireless Receiver Rate Decoupling for High-Code-Rate Signal Decoding
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Solution Overview
Problem
Existing wireless communication receivers face challenges in processing high code rate signals, which strain hardware and software processing resources, and are exacerbated by proposed enhancements and next-generation designs.
Innovation Solution
A wireless receiver employing variable-rate encoding and decoding techniques, which encodes multiple analog signals into a single composite signal at a first code rate, converts it to a digital signal, reconstructs it at a second code rate, and decodes it to output individual digital signals, thereby decoupling encoding and decoding rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple analog data signals are encoded at a high code rate to spread the data signals across a wide bandwidth, then the resistance to interference and reliability are improved, but the processing speed requirements and hardware resource strain increase
Solution Approach 1:
The receiver processes signals by separating them into individual signal paths, with each path handling a portion of the encoded data. This segmentation allows parallel processing at lower speeds while maintaining the benefits of high code rate encoding for reliability.
Solution Approach 2:
A digital signal processor acts as an intermediary between the high code rate encoder and the lower speed decoder. The DSP converts the high rate encoded signal to a lower rate while preserving the encoded information, enabling reliable decoding at reduced processing speeds.
2Productivity
If high speed encoders and high sampling rate ADCs are deployed to process high code rate signals, then the data processing capability is improved, but the power consumption and hardware complexity increase
Solution Approach 1:
The system changes the sampling rate parameter from high to low after the initial encoding stage. By converting the high code rate signal to a lower rate signal, the ADC and subsequent processing stages can operate at lower power consumption while maintaining data integrity.
Solution Approach 2:
The encoding is performed at high code rate in advance, before the signal reaches the ADC and digital processing stages. This preliminary high-rate encoding ensures reliability, while subsequent rate conversion allows lower power consumption in the main processing chain.
3Measurement precision
If high speed decoders are used to decode high code rate signals, then the decoding accuracy is improved, but the device complexity and processing resource strain increase
Solution Approach 1:
The decoding process is segmented into multiple stages: first converting the high rate signal to lower rate, then decoding the individual signal paths separately. This segmentation maintains decoding accuracy while reducing the complexity of each individual decoder component.
Solution Approach 2:
A rate conversion intermediary is introduced between the received high code rate signal and the decoder. This intermediary converts the signal to a lower rate that matches the decoder's operating speed, allowing accurate decoding without requiring excessively complex high-speed decoder hardware.
Data Source
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AI summary
The disclosed apparatus, structures, and methods are directed to a wireless receiver. The configurations presented herein employ a structure operative to receive a plurality of analog signals, a signal encoder configured to encode the plurality of received analog signals into a single encoded analog composite signal based on a coding scheme operating under a first code rate, a signal reconstruction module configured to segregate and reconstruct the single encoded digital composite signal into a re-encoded digital composite signal in accordance with the coding scheme operating under a second code rate. In addition, a signal decoder configured to decode the digital composite signals based on the coding scheme operating under the second code rate, and to output digital signals, in which each digital signal in the plurality of digital signals corresponds to a respective analog signal of the plurality of received analog signals.