Delay-spread sensor and detection switching circuit using the same

摘要

PCT No. PCT/JP94/01691 Sec. 371 Date Jan. 18, 1995 Sec. 102(e) Date Jan. 18, 1995 PCT Filed Oct. 11, 1994 PCT Pub. No. WO95/10888 PCT Pub. Date Apr. 20, 1995A multipath component detector detects the correlation between a received signal and a reference signal in a training period of the received signal and estimates and outputs the multipath received component levels at a plurality of timing points. A component ratio calculator calculates the ratio of each received component to the overall received power. By this, the level ratio of a specified received component can be detected. Power dissipation can be minimized by switching the detector to a differential detector or an adaptive equalizer in accordance with the result of the delay spread measurement.