Estimating Eb/Nt in a CDMA system using power control bits

Details Estimating Eb/Nt in a CDMA system using power control bits Estimating Eb/Nt in a CDMA system using power control bits

2007-06-05

2007-06-05

Gesesse, Tilahun (Department: 2684)

Telecommunications

Transmitter and receiver at separate stations

Plural transmitters or receivers

C455S069000, C455S226100, C370S318000

Reexamination Certificate

active

09891798

ABSTRACT:
A portable communication device including a power control system which estimates Eb/Ntby determining the variance of the noise components of PCBs that are received on the fundamental traffic channel. The power control system includes a demodulator for demodulating a BPSK modulated (or PAM) first signal from a base station, a noise variance calculation circuit that samples the perpendicular noise component of the demodulated signal to determine a noise variance, a power estimation circuit that measures the power of the demodulated signal and provides an estimate of the power of the first signal by eliminating the noise variance from the demodulated signal, and a comparator that compares the ratio of the power estimate and the noise variance to a threshold. The comparator output is a power up or power down signal to the base station.

REFERENCES:
patent: 5461639 (1995-10-01), Wheatley et al.
patent: 5603096 (1997-02-01), Gilhousen et al.
patent: 5634195 (1997-05-01), Sawyer
patent: 5946346 (1999-08-01), Ahmed et al.
patent: 5963870 (1999-10-01), Chheda et al.
patent: 5987326 (1999-11-01), Tiedemann et al.
patent: 6038220 (2000-03-01), Kang et al.
patent: 6073025 (2000-06-01), Chheda et al.
patent: 6075815 (2000-06-01), Chheda et al.
patent: 6154659 (2000-11-01), Jalali et al.
patent: 6304562 (2001-10-01), Kim et al.
patent: 6571104 (2003-05-01), Nanda et al.
patent: 6731949 (2004-05-01), Hamabe et al.
patent: WO 00/11877 (2000-03-01), None

Affiliated with

Also associated with

Rating

Estimating Eb/Nt in a CDMA system using power control bits does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Estimating Eb/Nt in a CDMA system using power control bits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Estimating Eb/Nt in a CDMA system using power control bits will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3821420