Method for detecting strength of receiving signals of users in a code division multiple access system

• US 6,097,710 A
• Filed: 10/27/1997
• Issued: 08/01/2000
• Est. Priority Date: 10/29/1996
• Status: Expired due to Term

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Dacom Corporation, Electronics and Telecommunications Research Institute
• Inventors: Shin, Sung Moon
• Primary Examiner(s): Kizou, Hassan
• Assistant Examiner(s): Qureshi, Afsar M.
• Application Number:
  US08/958,011
• Time in Patent Office: 1,009 Days
• Field of Search: 370/252, 370/332, 370/335, 370/328, 370/342, 370/441, 455/513, 455/522, 455/516, 455/422, 455/436-439, 455/69, 375/200
• US Class Current: 370/332
• CPC Class Codes: H04W 52/18 TPC being performed according to specific parameters
• CPC Class Codes: H04W 52/343 taking into account loading or congestion level
• CPC Class Codes: H04W 52/346 distributing total power among users or channels

Abstract

A method for detecting a strength of received signals of users in a code division multiple access system, which can upgrade a service quality for users and improve system performance by detecting strength of received signals in a code division multiple access system is disclosed. The apparatus comprises a radio frequency (RF) processor for receiving a high frequency power signal. A received power measuring device is connected to the radio frequency processor for measuring the strength of the power received from, the radio frequency processor. A correlator device is then connected to the received power measuring device for detecting a digital signal from the modulated signal of the received power measuring device. A channel processor device is provided for decoding the detected digital signal into an original digital signal in line with channels. A base station controller is connected to both the measuring device controller and the channel processor device for managing and controlling the channel processor. A measuring device controller is then connected to the received power measuring device for detecting the operational state of the system and the strength of the received signal by associating them each other in accordance with the strength of the power measured from the received power measuring device.

Claims

1. A method for detecting a strength of one of a plurality of received signals in a code division multiple access system which includes a radio frequency processor, a received power measuring device, a correlator device, a channel processor device, a base station controller and a measuring deice controller, the method comprises the steps of:

reading out the power of the plurality of received signals during a short period of a channel requesting period using said measuring device controller;

reading out a quantity of said plurality of channels assigned by a present base station using said base station controller;

calculating the strength of the one of a plurality of received signals using the read out power of the plurality of received signals and the quantity of channels assigned at the present base station; and

compensating the strength of the received signal in response to conditions of a user of one of said plurality of channels and the power control performance of the calculated strength of the received signal,

wherein said step of calculating the strength of the received signal of the user is calculated by using the following equation;

##EQU3## where P is a received power, c is a link capacity given by (W/R)/(Eb/No), W is a frequency band, R is an average value of signal transmit rate, Eb/No is a signal-to-noise rate and (Eb/No)k is Eb/No stored at k-th channel.

2. The method according to claim 1, wherein said step of reading out the strength of the plurality of received signals power is performed during approximately 10/1 of the channel requesting period.