Multichannel Transmission Apparatus Timing Offset PAPR Reduction
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Solution Overview
Problem
Current technologies are unable to effectively reduce the Peak to Average Power Ratio (PAPR) value during multichannel signal transmission, which is essential for improving the efficiency and capacity of communication systems.
Innovation Solution
A transmission apparatus that includes timing offset units to insert designated timing offset values into data from multiple channels, a multiplexing unit to combine these data, and a timing-offset calculating unit to determine optimal timing offsets for reducing PAPR, thereby shifting peak power occurrence places and minimizing the overall PAPR value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multichannel transmission is performed to increase transmission data volume, then transmission capacity is improved, but PAPR value increases
Solution Approach 1:
The invention applies preliminary action by inserting timing offsets into each channel signal before multiplexing. The timing offset insertion unit shifts the timing of each channel's data in advance, so that peak power occurrences are distributed across different time positions. This preliminary timing adjustment prevents peak power overlap when channels are combined, thereby reducing the overall PAPR value while maintaining multichannel transmission capacity.
2Power
If timing offset values are inserted to reduce PAPR, then peak power suppression is improved, but device complexity increases
Solution Approach 1:
The invention applies segmentation by dividing the signal processing into separate timing offset insertion units for each channel. Each unit independently processes its channel's data by inserting timing offsets, and the results are then multiplexed. This segmented approach simplifies the overall system design compared to complex global optimization methods, as each channel can be processed independently with relatively simple timing adjustment logic.
Data Source
AI summary
A transmission apparatus included in a communication system together with a reception apparatus and configured to multiplex data from M (M is a natural number equal to or larger than 2) channels and transmit the data to the reception apparatus. The transmission apparatus includes M timing offset units configured to respectively receive inputs of the data from the different channels and insert designated timing offset values in the input data, a multiplexing unit configured to multiplex the M data subjected to the timing offset and output a multiplexed signal, and a timing-offset calculating unit configured to calculate different timing offset values for the respective M timing offset units and output the calculated timing offset values to the respective timing offset units.