Power estimation for wireless communication devices in code division multiple access systems technical field
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorAndres Reial
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Abstract
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.
Claims28
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.
A wireless communication device for a code division multiple access system, the wireless communication device comprising a processing circuit for processing a received signal comprising multiple signal images to generate power estimates, the processing circuit configured to:
- compute a first set of power estimates at a first set of delays;
- generate 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
- compute 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.
A non-transitory computer readable medium storing computer executable program code for processing a received signal received by a wireless communication device, said program code, when executed by a processor, causes the processor to:
- compute a first set of power estimates at a first set of delays;
- generate 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
- compute 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.
Dependencies are inferred from the claim text.