CHANNEL ESTIMATION IN A CDMA SYSTEM WITH POWER CONTROL BITS

摘要

A transceiver transmits signals with power control bits, the power control bits instructing the other transceiver to establish selected power levels for its return signal. In one form, a processor is adapted to determine channel coefficients for the pilot symbols as a function of both (1) the selected power levels of the other transceiver signal and (2) the difference between the predetermined pilot symbols and the pilot symbols as received by the receiver. The processor then interpolates channel coefficients for all symbols in the received signals based on the determined pilot symbol channel coefficients. In an alternate form, the processor uses a selected auto-correlation function which takes into account the selected power levels of the other transceiver signal to calculate an interpolation filter. In this alternate form, the processor then uses the calculated interpolation filter and channel coefficients for the pilot symbols to interpolate channel coefficients for symbols between the pilot symbols. A demodulator demodulates all received symbols based on the interpolated channel coefficients.