Code power estimation for MIMO signals

Details Code power estimation for MIMO signals Code power estimation for MIMO signals

2011-07-19

2011-07-19

Fan, Chieh M. (Department: 2611)

Pulse or digital communications

Systems using alternating or pulsating current

Plural channels for transmission of a single pulse train

C375S346000

Reexamination Certificate

active

07983353

ABSTRACT:
Methods and apparatus for estimating code-reuse interference associated with a received multi-stream multiple-input multiple-output (MIMO) signal are disclosed. An estimate for the data-to-pilot power ratio, ΓD/P, may be obtained as a by-product of parametric estimation of impairment covariance associated with the received MIMO signal. In an exemplary method, a parametric impairment model is constructed for a received MIMO signal, the parametric model omitting code-reuse interference. Impairment covariance is measured, using, in one or more embodiments, received pilot symbol data. The parametric impairment model is fitted to the measured impairment covariance to obtain one or more scaling parameter values. A per-code energy value for a first data stream is then calculated from the one or more scaling parameter values. In some embodiments, the data-to-pilot power ratio for the received signal is first calculated from the one or more scaling parameters, and the per-code energy value calculated from the data-to-pilot power ratio.

REFERENCES:
patent: 6005887 (1999-12-01), Bottomley et al.
patent: 2001/0028677 (2001-10-01), Wang et al.
patent: 2003/0031234 (2003-02-01), Smee et al.
patent: 2005/0111528 (2005-05-01), Fulghum et al.
patent: 2005/0195889 (2005-09-01), Grant et al.
patent: 2005/0201447 (2005-09-01), Cairns et al.
patent: 2006/0256843 (2006-11-01), Grant et al.
patent: 2005/096517 (2005-10-01), None
patent: 2006037593 (2006-04-01), None
patent: 2006/132593 (2006-12-01), None
patent: 2008/076053 (2008-06-01), None
Jonsson, E. et al. “Receiver Parametric Covariance Estimation for Transmit Diversity.” Co-pending U.S. Appl. No. 11/751,109, filed May 21, 2007.
Bottomley, G. E. et al. “A Generalized RAKE Receiver for Interference Suppression.” IEEE Journal on Selected Areas in Communications, vol. 18, No. 8, Aug. 2000, pp. 1536-1545.
Fulghum, T. L. et al. “Method and Apparatus for Determining Combining Weights for MIMO Receivers.” Co-pending U.S. Appl. No. 11/613,677, filed Dec. 20, 2006.
3rd Generation Partnership Project. 3GPP TS 25.214, V8.3.0 (Sep. 2008). 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Physical layer procedures (FDD) (Release 8). Sep. 2008.
3rd Generation Partnership Project. 3GPP TS 25.101, V8.4.0 (Sep. 2008). 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; User Equipment (UE) radio transmission and reception (FDD) (Release 8). Sep. 2008.
Grant et al., “Generalized RAKE Receivers for MIMO Systems,” IEEE Vehicular Technology Conference, Orlando, FL, US, Oct. 6-9, 2003, pp. 424-428, vol. 1, IEEE, Piscataway, NJ, US.

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