OFDM receiver with time domain channel estimation
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United States of America Patent
Stats
-
Nov 15, 2016
Grant Date -
Nov 13, 2014
app pub date -
Jul 25, 2014
filing date -
Nov 15, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An OFDM communication system performs time domain channel estimation responsive to received symbols before the symbols are processed by a fast Fourier transform. The communication system generates virtual pilots from actual pilots to improve the stability and quality of channel estimation. The system generates a reference signal from the actual and virtual pilots and correlates the resulting reference signal with a signal responsive to the received symbol to generate an initial channel impulse response (CIR) and to determine statistics about the channel. In some circumstances, the resulting reference signal is correlated with a modified symbol in which the actual and virtual pilot locations are emphasized and the data locations are deemphasized. Time domain channel estimation iteratively improves on the initial CIR. The system determines channel estimates for data only symbols through averaging such as interpolation.
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Patent Citation Ranking
- 1 Citation Count
- H04L Class
- 8.87 % this patent is cited more than
- 9 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 15, 2028 |
