Power estimation for wireless communication devices in code division multiple access systems technical field

摘要

A wireless communication device for a CDMA system is configured to generate power estimates with reduced estimation bias. The power estimates may be used for delay estimation, MMSE channel estimation, demodulation, or other purposes. The wireless communication device produces first set of power estimates for a first set of delays and generates a model of the signal powers at the first set of delays as a function of the power leakage from non-aligned signal images in the received signal into the first set of delays. The wireless communication device then computes a second set of power estimates with reduced estimation bias based on the first set of power estimates and the model of the signal powers.

主权项

1. A method, implemented by a code division multiple access (CDMA) wireless communication device, for processing a received signal with multiple signal images to generate power estimates, the method comprising:
computing a first set of power estimates at a first set of delays; generating a model of signal powers at the first set of delays as a function of power leakage from non-aligned signal images in the received signal into the first set of delays; and computing a second set of power estimates with reduced estimation bias based on the first set of power estimates and the model of the signal powers.