Method, system and device for selecting antenna mode
An antenna mode and content technology, applied in the field of communication, can solve the problems of inability to determine the signal-to-noise ratio after data stream detection, and inability to select the antenna mode, and achieve the effect of improving system performance
Active Publication Date: 2009-11-18
XIAOMI INC
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Problems solved by technology
[0024] Embodiments of the present invention provide an antenna mode selection method, system and device to solve the problem that the receiving end cannot determine the data stream in the antenna mode to be selected after detection when the receiving end uses a dedicated pilot to transmit data in the prior art. signal-to-noise ratio, making it impossible to choose the optimal antenna pattern
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[0046] The embodiment of the present invention proposes a dedicated pilot design method in a multi-antenna system, so that no matter which antenna mode is used for current data transmission, the SNR after detection of each data stream in all antenna modes can always be obtained at the receiving end at the same time, thereby realizing transmission Adaptive switching of the antenna mode of the terminal, select the best multi-antenna technology matching the current channel, and adapt to the real-time change of the channel. In addition, when there are many transmitting antennas, the use of dedicated pilots will also save the overhead of pilot resources.
[0047] Preferably, the transmitting end in the embodiment of the present invention is a Node B, and the receiving end is a UE.
[0048] The embodiment of the present invention takes the downlink of a TDD High Speed Packet Access (HSPA) system with a rate of 1.28Mcps (1.28M chips per second) as an example, assuming that both the...
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The invention discloses a method, a system and a device for selecting an antenna mode, belonging to the technical field of communication and aiming to solve the problem that when a special pilot carrier is adopted to transmit data in the prior art, a receiving terminal cannot confirm post-detection signal-to-noise ratio of data stream in the antenna modes to be selected and accordingly cannot select the optimal antenna mode. The method for selecting an antenna mode comprises the following steps: after superimposing the transmission contents, a transmitting terminal transmits transmission contents in various antenna modes to a receiving terminal , wherein transmission contents in various antenna modes comprise the difference of special pilot carriers; the receiving terminal separates the transmission contents in various antenna modes, confirms the post-detection signal-to-noise ratio of each data stream in each antenna mode by utilizing the special pilot carriers of the transmission contents in various antenna modes and selects the antenna mode by the post-detection signal-to-noise ratio. The invention is used for the receiving terminal to select the optimal antenna mode so as to support the receiving terminal to adaptively switch the optimal antenna mode.
Description
technical field [0001] The present invention relates to the field of communication technologies, and in particular to an antenna mode selection method, system and device. Background technique [0002] In future communication systems, such as High Speed Packet Access Plus (HSPA+, High Speed Packet Access Plus), Long Term Evolution (LTE, Long Term Evolution) and other systems, multiple input multiple output (MIMO, Multiple Input Multiple Output) technology is introduced In order to further improve the data transmission rate and transmission quality of the system. In addition, smart antennas have also been widely used in communication systems. The open-loop MIMO technology includes spatial multiplexing (SM, Spatial Multiplexing) and transmit diversity (TD, Transmit Diversity) technology. The key technology used by the smart antenna is Beam-Forming (BF, Beam-Forming) technology. [0003] The applicable scenarios and problems to be solved of SM, TD, and BF multi-antenna te...
Claims
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Inventor 杨宇谭凤鸣
Owner XIAOMI INC