Channel estimation

Details Channel estimation Channel estimation

2011-06-14

2011-06-14

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S316000

Reexamination Certificate

active

07961795

ABSTRACT:
The channel estimation for a current data block is based on a previous data block, where the two data blocks are based on common information. Data symbol hypotheses of the previous data block can be forwarded to a channel estimator and used as known reference symbols when estimating the channel response for the current block. Alternatively, a combination of the data symbol hypotheses and preliminary data symbol estimates of the current block are used as reference symbols in a refined channel estimation for the current block. Data bit hypotheses of the previous block can also be input as a priori data in a preliminary demodulation of the current block. The demodulator output is used as reference data in a refined channel estimation for the current block. The technology is well-adapted for use in connection with Hybrid ARQ.

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