| 摘要 |
PROBLEM TO BE SOLVED: To establish an efficient channel estimation system requiring only minimum pilot information by channel estimation by using a digital data receiving block and a repeated channel estimation procedure. SOLUTION: A digital receiver includes an inverse spread block 32, a changed channel estimator 34, a maximum ratio coupler(MRC) 36, and a viterbi decoder 38. The estimator 34 for executing the repeated estimation method executes initial channel estimation by using a channel estimator using received signals, mutually couples receiving signals from respective fingers by a rake coupler 44 and demodulates data by using a demodulator. Then a data symbol is removed from each received signal in a data removing block by using demodulation data. A signal obtained by the result of data symbol removal is used for generation of a succeeding channel estimation value. The repeating process is repeated several times until a reliable channel estimation is obtained. |
