Signal reception apparatus in spectrum spread communication system

摘要

A signal reception apparatus in the spectrum spread communication system requires only a small amount of circuitry and consumes a small amount of electric power. A quadrature detector decomposes received signals into in-phase components and quadrature components, and supplies them to a complex-type matched filter. The complex-type matched filter de-spreads the in-phase components and the quadrature components and sends them to a multi-path selector. The multi-path selector selects, from among the received de-spread signals, multiple paths having high levels of signal electric powers and sends the received signals of the selected paths to multiple phase correction blocks. Analog operation circuits 31 through 34 calculate phase errors of the received signals of two successive pilot symbol blocks for each path. An analog operation circuit 40 corrects the phases of the received signals of the information symbol block that has been received between the two successive pilot symbol blocks. A RAKE combiner synchronously combines the phase-corrected de-spread received signals of each path.