[특허]Fixed wireless loop system having adaptive system capacity based on estimated signal to noise ratio

[미국특허] Fixed wireless loop system having adaptive system capacity based on estimated signal to noise ratio 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H04B-072/16 H04Q-007/00
출원번호	US-0988074 (1997-12-10)
발명자 / 주소	Nieczyporowicz Leon L Giallorenzi Thomas R Stephenson Philip L Sylvester Randal R
출원인 / 주소	L-3 Communications Corporation
대리인 / 주소	Perman & Green, LLP
인용정보	피인용 횟수 : 38 인용 특허 : 13

초록 ▼

A method is disclosed for operating a fixed wireless system having a radio base unit (RBU) that uses a code division multiple access (CDMA) airlink for communicating with a plurality of subscriber units (SUs). The method includes steps of (a) estimating a signal to noise ratio (SNR) of the FWS; (b) comparing the estimated SNR to a threshold SNR value; and (c) one of allowing service to another SU or not allowing service to another SU based on the result of the step of comparing. The step of estimating preferably uses a normalized SNR, and further employs the use of a null PN code detection technique. More particularly, the step of estimating determines a normalized signal to noise ratio given by Eb/No=20 log (SUT/MUT)-xdB, wherein SUT represents a single user test measurement, wherein MUT represents a multiple user test measurement, and wherein xdB is an adjustment factor. Other types of CDMA systems may also use this technique.

대표청구항 ▼

[ What is claimed is:] [1.] A method for operating a communications system having a radio base unit (RBU) that uses a code division multiple access (CDMA) airlink for communicating with a plurality of subscriber units (SUs), comprising steps of:(a) estimating a signal to noise ratio (SNR), said estimating being based on logarithmic values of a single user test measurement and a multiple user test measurement;(b) comparing the estimated SNR to a threshold SNR value; and(c) either allowing service to another SU or not allowing service to another SU based on the result of the step of comparing.

이 특허에 인용된 특허 (13) 인용/피인용 타임라인 분석

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[미국특허] Fixed wireless loop system having adaptive system capacity based on estimated signal to noise ratio 원문보기