Pre-equalisation for UMTS base station

Details Pre-equalisation for UMTS base station Pre-equalisation for UMTS base station

2003-10-20

2010-06-15

Lugo, David B (Department: 2611)

Pulse or digital communications

Transmitters

Antinoise or distortion

C375S229000

Reexamination Certificate

active

07738593

ABSTRACT:
An arrangement (100) and method for RF filtering in a Node B of a UMTS TDD system by providing: a DAC converter (130) converting digital signals to analog signals; providing a narrow band analogue channel filter (150) filtering the analog signals; and providing a digital pre-equaliser FIR filter (120) coupled before the DAC (120) to filter the digital signals, the digital pre-equaliser filter means substantially correcting for non linear phase response (122) non-ideality and amplitude response non-ideality (124) in the analogue channel filter (150). This provides the following advantage(s): it enables 3GPP Node B co-location specifications to be met while providing both good transmit accuracy and acceptable ISI performance; and it allows filter centre frequency to be field tuned in software, permitting a basic RF single-channel filter to used with its centre frequency being field adjustable to a desired value centred on a UMTS channel.

REFERENCES:
patent: 5627823 (1997-05-01), Pillekamp
patent: 5627826 (1997-05-01), Kameda et al.
patent: 5768317 (1998-06-01), Fague et al.
patent: 5909466 (1999-06-01), Labat et al.
patent: 6453237 (2002-09-01), Fuchs et al.
patent: 7027540 (2006-04-01), Wilson et al.
patent: 7324559 (2008-01-01), McGibney
patent: 2002/0126220 (2002-09-01), Wilson et al.
patent: 2002/0131488 (2002-09-01), Allpress et al.
patent: 2004/0137910 (2004-07-01), Beckmann et al.
patent: 0 551 803 (1993-07-01), None
patent: 0 551 803 (1993-07-01), None
patent: 0 827 295 (1998-03-01), None
patent: 0 827 295 (1998-03-01), None
patent: 0 994 570 (2000-04-01), None
patent: 1 235 360 (2002-08-01), None
patent: 2351624 (2001-01-01), None
patent: 2369016 (2002-05-01), None
patent: WO-02/082705 (2002-10-01), None
patent: WO-2004/039098 (2004-05-01), None
3GPP (Mar. 2002). “3rd Generation Partnership Project; Technical Specification Group Radio Access Networks; BS Radio Transmission and Reception (TDD) (Release 1999),”3GPPTS 25.105, V3.10.0, pp. 1-39.
3GPP (Mar. 2002). “3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Physical Channels and Mapping of Transport Channels onto Physical Channels (TDD) (Release 1999),”3GPPTS 25.221, V3.10.0, pp. 1-51.
ETSI (Dec. 2000). “Universal Mobile Telecommunications System (UMTS); UTRA (BS) TDD; Radio Transmission and Reception (3GPP TS 25.105 version 3.5.0 Release 1999),”ETSITS 125 105 V3.5.0 pp. 1-18.
Hosur, S. et al. (Sep. 2000). “Design of Cyclically Permutable Codes for PN Code Acquisition in WCDMA TDD Mode,”IEEE VTS Fall VTC2000 52nd Vehicular Technology Conference, Boston, MA, Sep. 24-28, 2000, pp. 581-587.
Koukourlis, S.S. et al. (Mar. 1995). “On the Capacity of an FFH-CDMA Packet Radio Network,”IEEE Transactions on Broadcasting41(1):17-22.
Lei, M. et al. (Jun. 2002). “Channel Estimation Based on Midamble in UTRA-TDD System,”Proceeding of the International Conference on Telecommunications 2002, Beijing, China, Jun. 23-26, 2002, 2:434-438.
Search Report for GB Application No. 0224757.5 filed Oct. 24, 2002, mailed Apr. 28, 2003, one page.
Sills, J.A. (Aug. 2002). “Adaptive Power Amplifier Linearization by Digital Pre-Distortion Using Genetic Algorithms,”IEEE Radio and Wireless Conference, Boston, MA, Aug. 11-14, 2002, pp. 229-232.
Springer, A. et al. (Sep. 2001). “Digital Predistortion-Based Power Amplifier Linearization for UMTS,”European Conference on Wireless Technology, London, England, Sep. 27-28, 2001, pp. 185-188.
Steiner, B. et al. (Sep. 1993). “Uplink Channel Estimation in Sychronous CDMA Mobile Radio Systems with Joint Detection,”The 4th International Symposium on Personal, Indoor and Mobile Radio CommunicationsYokohama, JP, Sep. 8-11, 1993, pp. 123-127.
Steiner, B. et al. (Jan.-Feb. 1994). “Optimum and Suboptimum Channel Estimation for the Uplink of CDMA Mobile Radio Systems with Joint Detection,”European Transactions on Telecommunications and Related Technologies5(1):39-50.
Väänänen, O. et al. (Sep. 2002). “Reducing the Peak to Average Ratio of Multicarrier GSM and EDGE Signals,”13th IEEE International Symposium on Personal Indoor and Mobile Radio Communications, Lisboa, PT, Sep. 15-18, 2002, 1:115-119.
Great Britain Examination Report mailed Oct. 5, 2005, for GB Application No. 0224757.5, filed Oct. 24, 2002, 2 pages.
Great Britain Search Report mailed Mar. 3, 2003, for GB Application No. 0224297.2 filed Oct. 18, 2002, 2 pages.
International Search Report mailed on Jun. 11, 2004 for PCT Application No. PCT/GB03/04587, filed Oct. 24, 2003, six pages.

Affiliated with

Also associated with

Rating

Pre-equalisation for UMTS base station does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pre-equalisation for UMTS base station, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pre-equalisation for UMTS base station will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4175311