Patent
A wireless telecommunications system that mitigates the effect of multipath fading
TLDR
In this paper, a wireless telecommunications system is described that mitigates multipath fading through an improvement in transmit diversity, which is well suited for use with all forward channel multiplexing schemes.Abstract:
A wireless telecommunications system is disclosed that mitigates multipath fading through an improvement in transmit diversity. Furthermore, embodiments of the present invention are well-suited for use with all forward channel multiplexing schemes (e.g., frequency-division multiplexing, time-division multiplexing, code-division multiplexing, etc.) and all modulation techniques (e.g., amplitude modulation, frequency modulation, phase modulation, etc.). An illustrative embodiment of the present invention comprises: a signal inverter (613) for inverting and alternately not-inverting a first signal in accordance with a schedule (615) to create a second signal; a first antenna for transmitting the first signal; and a second antenna for transmitting the second signal.read more
Citations
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Patent
Method and apparatus for transmit power modulation in a wireless communication system
TL;DR: In this article, a transmitter and a second gain element are configured and arranged to modulate a radio-frequency signal according to a first gain factor to produce a first output signal.
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Wen-Yen Chan,Nasserullah Khan,Qingzhong Jiao,Xin Jin,Nagula Tharma Sangary,Michael F. Habicher +5 more
TL;DR: In this article, a power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station.
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Method and apparatus for feedback error detection in a wireless communications systems
TL;DR: In this article, an error in closed loop transmit diversity (CLTD) feedback signaling was detected and/or corrected by a mobile station, according to aspects of the present invention, based on signals received from a base station.
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Diversity transmission in a Mobile Radio System
TL;DR: In this article, a novel method and a novel base station are proposed to apply the diversity principle to more than two antennas, and the switching of the connections in such a way that the first antenna group is connected to the first transmitting apparatus and the second antenna group to the second transmitting apparatus.
References
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Patent
Cdma microcellular telephone system and distributed antenna system therefor
TL;DR: In this article, a code division multiple access (CDMA) communication system in which cellular techniques are utilized in a wireless Private Branch Exchange (PBX) environment is defined in which a base station (10) communicates user information signals using CDMA communication signals with subscriber terminals.
Patent
Dual distributed antenna system
TL;DR: In this article, a distributed antenna system (30, 35) is utilized in a communication system for providing multipath signals which facilitate signal diversity for enhanced system performance, where each node (200) of the antenna system comprises more than one antenna (196).
Patent
Wireless direct sequence spread spectrum digital cellular telephone system
TL;DR: In this paper, the authors used a dual cross-polarized antennae (11A1 and 11A2) for each of the handsets (11-1, 11-2,..., 11N) by using a common reference oscillator (15); a telephone system interface (17); and clock logic circuitry.
Patent
Wireless telephone distribution system with time and space diversity transmission
TL;DR: In this paper, a wireless communication system combines time and space diversity to reduce fading and simplify receiver design, where a data packet which carries digital telephone traffic is transmitted at three different times from three different antennas.
Patent
Method and apparatus for multiplexing communications signals through blind adaptive spatial filtering
William A. Gardner,S.V. Schell +1 more
TL;DR: In this article, an adaptive antenna array at a base station is used in conjunction with signal processing through self coherence restoral to separate the temporally and spectrally overlapping signals of users that arrive from different specific locations within the locale and to mitigate multipath fading and shadowing at the base station and, by reciprocity, to transmit directively to minimize interfering signals arriving at the mobile (or portable or stationary) units.