Transmission Apparatus Fixed Symbol Interpolation
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Solution Overview
Problem
Conventional single carrier (SC) block transmission techniques suppress transmission peak power and reduce multipath phasing effects but result in discontinuous phase and amplitude between blocks, leading to out-of-band spectrum interference that violates spectral masks in communication systems.
Innovation Solution
A transmission apparatus is designed with a data-symbol generation unit, a fixed-symbol arrangement unit, and a CP insertion unit that inserts fixed symbols between data symbols to maintain phase and amplitude continuity between blocks, using interpolation and oversampling to reduce out-of-band spectrum leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional SC block transmission is used to suppress peak power and reduce multipath phasing, then transmission peak power is reduced and multipath effects are minimized, but phase and amplitude become discontinuous between blocks causing out-of-band spectrum interference
Solution Approach 1:
The invention applies preliminary action by inserting fixed symbols at predetermined positions before transmission occurs. These fixed symbols are placed in advance to ensure phase and amplitude continuity between SC blocks, preventing out-of-band spectrum interference before it can occur during transmission.
Solution Approach 2:
The fixed symbols act as intermediaries between data symbols in different SC blocks. By inserting these fixed symbols at specific positions, the invention creates a bridging element that maintains phase and amplitude continuity, thereby reducing out-of-band spectrum interference while preserving the peak power suppression benefits of SC transmission.
2Object-generated harmful factors
If fixed symbols are inserted between data symbols to maintain phase and amplitude continuity, then out-of-band spectrum interference is reduced, but device complexity increases
Solution Approach 1:
The invention applies local quality by inserting fixed symbols only at specific predetermined positions between data symbols, rather than uniformly across the entire signal. This localized approach maintains phase and amplitude continuity where needed while minimizing the overall impact on device complexity and signal structure.
Data Source
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AI summary
A transmission apparatus that transmits a block signal including a plurality of data symbols, includes a data-symbol generation unit 1 that generates data symbols; a fixed-symbol arrangement unit 2 that arranges a data symbol and a fixed symbol such that the fixed symbol is inserted at a predetermined position in the block signal to generate a block symbol; an interpolation unit 3 that performs interpolation processing on the block symbol; and a CP insertion unit 4 that inserts a Cyclic Prefix into a signal on which the interpolation processing has been performed to generate the block signal.