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Smart antennas (SA) has not been applied widely in 3G except TD-SCDMA. As to the application of SA in CDMA system, we argued that people hold certain incorrect view, especial the reciprocity characteristic. Generally, people consider that only using a set of SA, we can simultaneously realize multiple CDMA channels directional transmission on a single carrier frequency with the same uplink & downlink...
Currently, all the available references about the transmitting characteristic of smart antenna in the CDMA system have wrongly considered that only one SA can simultaneously make multiple CDMA channels transmission directionally on a single carrier. By means of the basic principles of phased array antenna and the virtual test for SA it has been proved in this paper that the view mentioned above can...
SA (smart antennas) is a core technology of TD-SCDMA system. That is because people consider that a set of SA can simultaneously directionally receive multiple CDMA channel signals on a single carrier. And then according the reciprocity of transceiver, the directional transmission of multiple CDMA channel signals can also be realized on a single carrier by a set of SA. This technology can dramatically...
In this paper, the application of smart antennas (SA) in TD-SCDMA is discussed. Generally, people consider that the SA have the SDMA (space division multiple access) effect, based on which the directional beamforming of transmission/receiving can be achieved. That is to say, in TD-SCDMA, on single carrier, simultaneous directional receiving/transmitting is expected to be achieved by using a set of...
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