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公开(公告)号：RU2137306C1
公开(公告)日：1999-09-10
申请号：RU96112146
申请日：1995-09-12
Applicant: QUALCOMM INC
Inventor： LINDSEJ A UIVER , POL E BENDER
Abstract: FIELD: cellular communication systems. SUBSTANCE: device has two attenuators first one being used to control power level of artificially introduced noise and second attenuator, to set transmitted power level. When base station is additionally inserted, transmitted power is at first low and artificially introduced noise level is high so that coverage areas of forward and reverse communication lines are aligned and reside in immediate proximity of base station. As soon as base station fully comes in service, artificially introduced noise level reduces and transmitted power level rises so that both coverage areas of base station are held in balanced condition as coverage areas are extending. When base station is removed from system, same attenuators are used to concurrently close down both coverage areas in the course of reduction of transmitted power level from base station. EFFECT: provision for preventing system overload and for no-noise communications. 71 cl, 9 dwg
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公开(公告)号：RU2125344C1
公开(公告)日：1999-01-20
申请号：RU92016467
申请日：1991-06-21
Applicant: QUALCOMM INC
Inventor： KLEJN S GILKHAUSEN , IRVIN M DZHEHKOBS , ROBERTO PADOVANI , LINDSEJ A UIVER , CHARL Z E UITLI III , EHNDRJU DZH VITERBI
IPC: H04B1/707 , H04B1/7075 , H04B1/709 , H04B1/7115 , H04B7/005 , H04B7/26 , H04J3/02 , H04J3/16 , H04J3/22 , H04J11/00 , H04J13/00 , H04J13/10 , H04J13/18 , H04L20060101 , H04L1/00 , H04L1/06 , H04L1/08 , H04L5/02 , H04L5/12 , H04L23/02 , H04L27/30 , H04W52/26
Abstract: FIELD: communications engineering; data signal exchange with spectral extension of messages. SUBSTANCE: with orthogonal pseudorandom noise codes, mutual correlation equals zero at predetermined time interval so that no interference exists between orthogonal codes on condition that time intervals of codes are aligned. Cellular assembly and mobile pieces of equipment use direct sequential extended-spectrum communication signals for exchanging messages. Monitoring, synchronizing, page, and voice channels are discriminated in cell-to-mobile-equipment communication line. Data transmitted over this communication line is coded, interlaced, modulated by two-phase key shift with orthogonal coverage of each character modulated by two-phase key shift and with extension of covered characters by quadrature-phase key shift. Access channel and voice channel are separated in mobile-equipment-to-cell line. Data transmitted over channels of mobile-equipment-to-cell line is coded, interlaced, and orthogonally indicated along with extension by quadrature-phase key shift. EFFECT: reduced mutual interference, increased carrying capacity, and improved quality of communication line. 61 cl, 15 dwg
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公开(公告)号：RU2142197C1
公开(公告)日：1999-11-27
申请号：RU97111851
申请日：1995-11-29
Applicant: QUALCOMM INC
Inventor： EHDVARD G TAJDMANN , JU-CHEUN DZOU , LINDSEJ A UIVER , GVEHJN BEHJLI
Abstract: FIELD: digital communication equipment, in particular, cellular communication networks using extended spectrum communication channels. SUBSTANCE: method involves receiving test sequence of digital data transmitted through channel by receiving station, which also generates copy of test sequence of digital data. Precision of information transmission through communication channel is detected by comparison of copy of test data sequence received through communication channel. Invention provides possibility to transmit test sequence of digital data at single rate from set of possible data transmission rates, while receiving station provides identification of data transmission rate with respect to each test sequence of digital data. To model transmission of, for example, voice data system may be configured so that each test sequence of digital data is generated according to pseudorandom process. EFFECT: quantitative estimation of quality of communication channels in digital communication system. 28 cl, 3 dwg, 6 tbl
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