With a fine filter pre-session and coarse mapper precession π / 4DQPSK modulationPROBLEM TO BE SOLVED: To reduce the memory capacity required for a π/4 DQPSK filter on a ROM base by configuring the modulator with a mapper that generates a modulation state symbol, a shift register that ...
A BS digital broadcast receiver having no 8PSK demapper and a less number of delay circuits for Trellis encoding. A QPSK baseband signal based on the position of the received signal point of a baseband demodulation signal having an absol... HORII, AKIHIRO,SHINJO, SOICHI,MATSUDA, SHOJI,... ...
Jianing Su; Zhenghao Lu; Xiaopeng Yu; Changhui Hu, A Novel Low Complexity Soft-‐ decision Demapper for QPSK 8-‐PSK Demodulation of DVB-‐S2 system, International ...