Yutaka Murakami

TL;DR: In this article, soft decision parts (503,506) perform temporary decisions of modulated signals (502,505) as separated by a separating part (501) using an inverse matrix calculation of a channel scatter matrix Signal point reduction parts (508,510,514,516,516) use the temporary decision results (504,507) to reduce the number of candidate signal points of multiplexed modulated signal.

TL;DR: In this paper, an average signal point amplitude detection section 15A determines an average position of I and Q components when a received QPSK modulated signal is demodulated, and a threshold calculation section 15B determines threshold ths on an IQ plane based on the average signal points position of the received X-axis and a theoretical distribution position on the IQ plane of signal points of a 16-value QAM signal.

TL;DR: In this article, the first OFDM modulator generates a first information signal using a first modulation scheme, the second information signal having a plurality of subcarriers, and that generates a third OFDM modulation signal by changing a second position in an in-phase quadrature-phase plane in which a signal point of the second of the first information signals is positioned, to a third position, the third position being different from a first position in the in phase-quadrature phase plane where the first of the two signals are positioned.

TL;DR: A nonlinear distortion compensating device splits its operation into two processes as mentioned in this paper : a compensation and amplification process for providing a receipt signal with a distortion compensated calculation and amplification before outputting the signal with phase and amplitude compensated, and an environmentally adapting process for modulating the signal demodulated from the input signal.

TL;DR: In this article, an LDPC-CC (Low-Density Parity-Check Convolution Codes) encoder and decoder is proposed, which performs an error correction encoding and decoding while reducing the amount of a termination sequence required for encoding/decoding.