Channel code decoding for the CDMA forward link

Details Channel code decoding for the CDMA forward link Channel code decoding for the CDMA forward link

2006-02-07

2006-02-07

Vo, Nguyen T. (Department: 2685)

Telecommunications

Receiver or analog modulated signal frequency converter

Measuring or testing of receiver

C455S067110, C370S320000

Reexamination Certificate

active

06996385

ABSTRACT:
Channel coding is used on the forward link of a CDMA cellular telephone network to allow the CDMA mobile channel decoder to perform error correction. On a wireless link, channel code performance is improved by providing the channel decoder with an estimate of the reliability of each received symbol. This reliability information is typically the ratio of desired signal energy to interference plus noise variance at the channel decoder input. This invention improves CDMA mobile channel decoder performance using a new technique for calculating more accurate estimates of the signal to interference plus noise ratio at the input of the mobile channel decoder.

REFERENCES:
patent: 6088335 (2000-07-01), I et al.
patent: 6157619 (2000-12-01), Ozluturk et al.
patent: 6212174 (2001-04-01), Lomp et al.
patent: 6278701 (2001-08-01), Ayyagari et al.
patent: 6731622 (2004-05-01), Frank et al.
Proakis, J.G.,Digital Communications,McGraw Hill, 4th edition, 2001. p. 58.
TIA/EIA,IS-95-B: TIA/EIA Interim Standard: Mobile Station Base Station Compatibility Standard for Dual-Mode Wideband Spread Spectrum Cellular System,Telecommunications Industry Association, 1999. p. 7-5.
TIA/EIA,IS-2000-2: TIA/EIA Physical layer standard for CDMA2000 spread spectrum systems,Telecommunications Industry Association, 1999. pp. 3-76-3-88.
3rd Generation Partnership Project, “Technical specification group radio access network: Multiplexing and channel coding (FDD) (release 1999), ” Mar. 2000, V3.2.0. pp. 16-22.
Rahnema, M. and Y. Antia, “Optimum soft decision decoding with channel state information in the presence of fading.”IEEE Communications Magazine,vol. 35, No. 7, pp. 110-111, Jul. 1997.
Vucetic, B. and J. Yuan,Turbo Codes: Principles and Applications,Kluwer, 2000. p. 145.
Mohr, W. and M. Kottkamp, “Downlink performance of IS-95 DS-CDMA under multipath propagation conditions.”IEEE Fourth International Symposium on Spread Spectrum Techniques and Applications,Sep. 1996, vol. 3, pp. 1063-1067.
Hueda, M.R., C. Rodriguez, and C. Marques, “New interpath interference model for DS-CDMA indoor transmissions with distributed antennas,”11th IEEE Symposium on Personal, Indoor and Mobile Radio Communications(PIMRC 2000), Sep. 2000, vol. 1, pp. 92-97.
Kim, H., J. Koo, Y.Han, and C. Kang, “Foward link capacity based on interference characteristics in CDMA systems,”52nd IEEE VTS Fall Vehicular Technology Conference(VTC 2000 Fall), Sep. 2000, vol. 2, pp. 592-596.
Thompson, J.S., P.M. Grant, and B. Mulgrew. “Downlink transmit diversity schemes for CDMA networks,”IEEE VTS 50th Vehicular Technology Conference,Fall, Sep. 1999, vol. 3, pp. 1382-1386.
Alamouti, S.M. “A simple transmit diversity technique for wireless communications,”IEEE Journal on Selected Areas in Communication,vol. 16, No. 8, pp. 1451-1458, Oct. 1998.
Hueda, M.R., Corral-Briones, G. and C. Rodriguez, “MMSEC-RAKE receivers with resolution reduction of the diversity branches: analysis, simulation, and application,”IEEE Transactions on Communications,Jun. 2001, vol. 49, pp. 1073-1081.

Affiliated with

Also associated with

Rating

Channel code decoding for the CDMA forward link does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Channel code decoding for the CDMA forward link, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Channel code decoding for the CDMA forward link will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3698147