SC Block Transmission Apparatus Phase Continuity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional SC block transmission techniques reduce transmission peak power but result in out-of-band spectrum leakage due to phase and amplitude discontinuities between blocks, which interfere with adjacent channels and violate spectral mask requirements.
Innovation Solution
A transmission apparatus that generates block signals by inserting a copied symbol from a previous block at a specific position within each block, followed by time/frequency conversion, interpolation, and cyclic prefix insertion to reduce out-of-band spectrum through phase continuity between blocks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If SC block transmission is used to reduce peak power, then transmission peak power is reduced, but out-of-band spectrum leakage occurs due to phase and amplitude discontinuities between blocks
Solution Approach 1:
The patent applies preliminary action by copying a symbol from the previous block and inserting it at a specific position in the current block before transmission. This pre-insertion of the copied symbol ensures phase continuity between blocks, preventing out-of-band spectrum leakage while maintaining the peak power reduction benefits of SC block transmission
Solution Approach 2:
The patent uses the copying principle by duplicating a symbol from the previous block and inserting it into the current block. This copying mechanism creates phase continuity across block boundaries, eliminating the harmful phase discontinuities that cause out-of-band spectrum leakage
2Object-generated harmful factors
If copied symbol is inserted at specific position to maintain phase continuity, then out-of-band spectrum is reduced, but device complexity increases due to additional storage and symbol insertion units
Solution Approach 1:
The patent applies segmentation by dividing the transmission apparatus into distinct functional units: a storage unit that holds the copied symbol and a symbol insertion unit that inserts it at the appropriate position. This modular segmentation makes the complexity manageable and allows each unit to perform its function independently
Data Source
AI summary
A transmission apparatus includes: a data-symbol generation unit that generates data symbols for one block in each block; a storage and processing unit that stores therein a data symbol at a first position, among the data symbols for one block, as a copied symbol; a symbol insertion unit that generates a block symbol by putting the data symbols and the copied symbol such that the copied symbol stored in the storage and processing unit are inserted at a second position of the data symbols for one block; a time/frequency conversion unit that converts the block signal into a frequency domain signal; an interpolation unit that performs interpolation processing on the frequency domain symbol; and a CP insertion unit that generates the block signal by inserting a Cyclic Prefix into a signal on which the interpolation processing has been performed.