Multi-Channel Receiver Module for Stable Wide-Power Signal Decoding
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Solution Overview
Problem
Existing receiver modules for broadband data transmission systems face instability and signal disturbances due to high controlling speeds, particularly with recursive AGC algorithms, leading to oscillations and ineffective signal processing.
Innovation Solution
A receiver module with multiple receiving channels, each equipped with an analog-to-digital converter and soft-input-soft-output decoders, where attenuators are configured to ensure overlapping linear operating ranges, and an analysis module selects the optimal channel based on probability quantities to maintain stability and process signals effectively, even at high input powers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If recursive AGC algorithms are used for fast control of adjustable elements, then controlling speed is improved, but stability deteriorates leading to oscillations
Solution Approach 1:
The receiver is divided into multiple parallel receiving channels (first channel without attenuator, second channel with attenuator). Each channel processes the input signal independently through its own ADC and SISOD decoder, allowing simultaneous operation without the instability issues of recursive control algorithms.
Solution Approach 2:
The system dynamically selects between different receiving channels based on input signal power levels. The analysis module compares probability quantities from multiple channels and selects the optimal channel, enabling adaptive response without recursive control loops that cause oscillations.
2Adaptability or versatility
If electronically adjustable attenuators and amplifiers are used in AGC, then dynamic range handling is improved, but signal disturbances occur due to envelope curve modification
Solution Approach 1:
Instead of using a single adjustable attenuator that modifies the signal envelope, the invention segments the signal path into multiple fixed channels. One channel processes signals without attenuation while another channel uses a fixed attenuator, and the system selects the appropriate channel based on input power levels, avoiding envelope modification disturbances.
Solution Approach 2:
The analysis module acts as an intermediary that selects between parallel processing paths. Rather than directly controlling adjustable elements that disturb the signal, the system uses the analysis module to choose from pre-configured channels with different attenuation levels, eliminating the harmful effect of dynamic envelope modification.
3Adaptability or versatility
If multiple receiving channels with overlapping linear operating ranges are used, then input power range coverage is improved, but device complexity increases
Solution Approach 1:
The receiver is segmented into multiple receiving channels, each with an ADC configured to operate in a specific linear range. By dividing the overall input power range into overlapping segments handled by different channels, the system achieves wide dynamic range coverage while maintaining simple, fixed processing in each channel without complex adjustable elements.
Data Source
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AI summary
A receiver module (10) for receiving an electromagnetic signal, comprising an analog frontend (12) and at least a first receiving channel (14) and a second receiving channel (16) is described. The receiving channels (14, 16) are both connected to the analog frontend (12), wherein the frontend (12) is configured to receive an input signal comprising a symbol sequence and to forward the input signal to the receiving channels (14, 16), wherein the receiving channels (14, 16) each comprise an analog to digital converter (22, 26), wherein the second receiving channel (16) comprises an attenuator (30), wherein the first receiving channel (14) and the second receiving channel (16) each comprise a soft-input-soft-output-decoder (24, 28), and wherein the soft-input-soft-output decoders (24, 28) each are configured to process the symbol sequence. Moreover, a data transmission system and a method for receiving an electromagnetic signal are described.