Receiver Decoder Switching for Lower Idle-State Power
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Solution Overview
Problem
Conventional transceiver apparatuses in network communication systems consume excessive power due to the high power consumption of viterbi decoders, which lack a mechanism to detect the signal state during data transmission or idle states.
Innovation Solution
A transceiver apparatus with a receiver that includes an analog-to-digital converter, equalizer, slicer, delay unit, decoder, select unit, and control unit, where the control unit detects the signal state and enables or disables the decoder operation to conserve power by selecting between the delayed sliced signal and decoder output based on stream delimiters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the viterbi decoder operates continuously to reduce bit error rate, then the signal reception quality is improved, but the power consumption increases excessively
Solution Approach 1:
The patent applies dynamics by making the decoder's operational state changeable based on signal conditions. The control unit dynamically switches the decoder between active and inactive states according to whether data is actually being transmitted, allowing the system to adapt its power consumption to the current operational requirements while maintaining reliability when needed.
Solution Approach 2:
The patent changes the operational parameter of the decoder from a fixed continuous operation mode to a variable mode controlled by the control unit. By monitoring signal characteristics and controlling the decoder's enable/disable state, the system adjusts its processing activity to match actual data transmission conditions, thereby reducing unnecessary power consumption while maintaining bit error rate performance.
2Reliability
If the viterbi decoder is always active, then the decoding function is ensured, but the device complexity and power management become problematic
Solution Approach 1:
The patent implements feedback by using the control unit to monitor the signal state and adjust the decoder's operational status accordingly. The control unit receives information about signal presence and actively controls whether the decoder processes data, creating a closed-loop system that automatically manages power consumption based on actual decoding needs without requiring complex external power management mechanisms.
Data Source
AI summary
A transceiver apparatus, a receiver and a power saving method thereof are provided. The receiver includes an analog-to-digital converter, an equalizer, a slicer, a delay unit, a decoder, a select unit and a control unit. The analog-to-digital converter transforms a received signal into a digital signal. The equalizer adjusts the digital signal to generate an equalized signal. The slicer receives and slices the equalized signal and generates a sliced signal. The delay unit delays the sliced signal. The decoder determines whether to decode the equalized signal or not according the control signal. The select unit selects one of the output of the delayed sliced signal and the output of the decoder to be an output signal according to a second control signal. The control unit determines whether to enable the control signal and the second control signal according to the state of the sliced signal and the output signal.