Patent
Modulation/demodulation method for multi-value digital modulation signal and orthogonal frequency division multiplex system
Besma Kraiem,クライエム、ベズマ +1 more
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TLDR
In this paper, a differential phase encoder 15 of a transmitter 10 applies differential modulation to a phase of each symbol without changing amplitude of the symbol, and the transmittar 10 transmits a multi-value digital modulation signal to a radio channel 1.Abstract:
PROBLEM TO BE SOLVED: To further simplify the circuit configuration of a transmitter and a receiver. SOLUTION: A differential phase encoder 15 of a transmitter 10 applies differential modulation to a phase of each symbol, where a same subcarrier is consecutive in the OFDM system without changing amplitude of the symbol, and the transmittar 10 transmits a multi-value digital modulation signal to a radio channel 1. A receiver 30 receives the multi-value digital modulation signal sent via the radio channel 1, and a differential phase decoder 38 of the receiver 30 demodulates the phase of each consecutive symbol in the same subcarrier and applies coherent processing to the amplitude.read more
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Patent
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