Abstract: The present invention relates to a method for constructing a self-organizing mobile communication system which is mobile, self-organizing and can make common commercial terminals communicates with outside, comprising: searching for the pilot signals of adjacent area base stations in a manner similar to user terminals by a base station without direct connection to a base station controller, setting the local area covered by the base station as the next lower-level area of the adjacent area through responding to the pilot signals by the base station so as to form a subordinate relationship to the adjacent area; conducting relay communications by base stations at each above level, wherein the relay communication starting from a second or below-second-level area base station by a commercial user terminal covered by the second or below-second-level area base station, eventually establishing communications between the commercial user terminal and the base station controller in a public mobile communication system v

Abstract: The invention discloses a real-time calibration method for a smart antenna array. Said method can calibrate a TDD CDMA system and a FDD CDMA system with separated transmission and reception antenna arrays.

Abstract: The invention discloses a method for transmitting high-speed downlink package data in a mobile communication system with a smart antenna, which not only can take full advantage of radio beamforming of smart antenna but also can transmit downlink package data high efficiency.

Abstract: This invention discloses an interference cancellation method based on smart antenna, which can solve various interference in mobile communication systems such as multipath propagation, etc., while using smart antenna. The invention includes the steps of: with a beam forming matrix, beam forming the output signal of a receiver based on smart antenna, then getting a set of digital signals NRk(m); canceling other users main path signal included in NRk(m), then getting another set of digital signals NSk(m), which only includes needed signals and all interference signals; searching in digital signal NSk(m) and getting all multipath interference signals coming from other users; canceling other multipath interference signal in NSk(m); and superposing the user main path and each multipath signal in phase coincidence, then getting a digital signal with interference canceled.

Abstract: This invention discloses a method and a device for calibrating smart antenna arrays in real time. The invention includes the steps of providing a calibrating link comprising a coupling structure, feeder cables and pilot transceiver; pre-calibrating the coupling structure with a vector network analyzer and recording its receiving and transmitting transmission coefficients, respectively; implementing the receiving calibration to a smart antenna array by adjusting the transmission coefficient of each receiving link and a reference link to the same amplitude and phase difference &PHgr;, which is recorded and stored in a baseband processor; and implementing the transmitting calibration by adjusting the transmission coefficient of each transmitting link and a reference link to the same amplitude and phase difference &PSgr;, which is recorded and stored in the baseband processor. The coupling structure of the invention is implemented by a pilot antenna using spatial couple mode or a passive network.

Abstract: The invention relates to a method and an apparatus using smart antennas in a frequency division duplex code division multiple access mobile communication system and for solving the limitations of smart antenna use due to asymmetric propagation of uplink electric wave and downlink electric wave. In the wireless base station, there are transmitting and receiving smart antenna arrays and associated transmitters and receivers, respectively, and a common baseband signal processor. In the method, the main path direction is determined by signal direction of arrival, obtained from receiving signal; in the downlink beam forming, an expected transmitting beam form is based on the main path direction. The system can obtain advantages of smart antenna, improve cell coverage, increase system capacity and reduce cost.

Abstract: A distributed smart antenna system including an antenna array having N antenna elements, N radio frequency tranceivers, and feeder cables connecting both. N antenna elements and N radio frequency transceivers are grouped according to cell coverage range and traffic volume. Antenna element groups are then distributed at different places of coverage within the range of the same wireless communication system base station, including different buildings or different floors of same building; however, the same baseband digital signal processor is used. Each antenna element group can have one to M antenna elements. The system enables improved cell coverage, increased system capacity, and decreased system cost.

Abstract: This invention discloses an interference cancellation method based on smart antenna, which can solve various interference in mobile communication systems such as multipath propagation, etc., while using smart antenna. The invention includes the steps of: with a beam forming matrix, beam forming the output signal of a receiver based on smart antenna, then getting a set of digital signals NRk(m); canceling other users main path signal included in NRk(m), then getting another set of digital signals NSk(m), which only includes needed signals and all interference signals; searching in digital signal NSk(m) and getting all multipath interference signals coming from other users; canceling other multipath interference signal in NSk(m); and superposing the user main path and each multipath signal in phase coincidence, then getting a digital signal with interference canceled.

Abstract: This invention discloses a method and a device for calibrating smart antenna arrays in real time. The invention includes the steps of providing a calibrating link comprising a coupling structure, feeder cables and pilot transceiver; pre-calibrating the coupling structure with a vector network analyzer and recording its receiving and transmitting transmission coefficients, respectively; implementing the receiving calibration to a smart antenna array by adjusting the transmission coefficient of each receiving link and a reference link to the same amplitude and phase difference &PHgr;, which is recorded and stored in a baseband processor; and implementing the transmitting calibration by adjusting the transmission coefficient of each transmitting link and a reference link to the same amplitude and phase difference &PSgr;, which is recorded and stored in the baseband processor. The coupling structure of the invention is implemented by a pilot antenna using spatial couple mode or a passive network.

Abstract: A wireless communication system has a protocol enabling synchronous code division multiple access (CDMA) communication on a time division duplex (TDD) frequency, and provides for a smart antenna system as an integral component of the system. The protocol has downlink time slots (DTS) which provide for synchronization and paging of all remote terminals from a base station on a omnidirectional code channel and while providing for traffic signals on directional traffic channels. The protocol has uplink time slots (DTS) which enable rapid link requests by remote terminals, as well as enabling improved spacial estimation, synchronization and power control of remote terminals by the base station.

Abstract: A six port network for use in determining a complex reflection coefficient associated with a microwave network. A directional coupler is connected between first and second ports of the six port network for transmitting microwave energy from a microwave source connected to the first port, to the microwave network connected to the second port. This coupler provides two signals respectively representative of the microwave energy supplied to the first port, and of the transmitted microwave energy reflected at the microwave network. The six port network further comprises a microwave circuit for producing from the two representative signals, four microwave power readings respectively associated with third, fourth, fifth and sixth ports of the six port network and proportional to .vertline.a.vertline..sup.2, .vertline.1+.alpha.e.sup.j.phi. .GAMMA..vertline..sup.2, .vertline.1+.alpha.e.sup.j(.phi.+120.degree.) .GAMMA..vertline..sup.2 and .vertline.1+.alpha.e.sup.j(.phi.-120.degree.) .GAMMA..vertline..sup.