COMMUNICATION TERMINAL DEVICE

摘要

PURPOSE: A communication terminal device of an OFDM CDMA type is provided to compensate for residual phase errors by compensating each receiving signal using remaining phase error. CONSTITUTION: Each diffusing part(101) diffuses each of transmission signals(1) with an inherent diffusion code. A diffusing part(102) diffuses a known signal with a diffusion code for a diffusion signal. An S/P converter(104) decomposes a signal, in which each transmission signal and known signal after diffusion are multiplexed in each chip, and an IFFT part(105) performs frequency division multiplexing of a chip data string. An FFT part(107) perform Fourier transform processing of a received signal and extracts each subcarrier signal. A P/S converter(109) converts a plurality of series signals after compensation processing into a single series signal. Each inverse diffusing part(110) inversely diffuses a received signal converted into a single series signal with a prescribed diffusion code. An inverse diffusion processing part(111) inversely diffuses the received signal converted into the single series signal with a diffusion code for a known signal. A residual phase error detecting part(113) detects a residual phase error with the known signal and the received known signal after inverse diffusion processing. A phase compensating part(112) compensates each received signal for the residual phase error.