MULTI-ANTENNA WIRELESS COMMUNICATION METHOD, MULTI-ANTENNA WIRELESS COMMUNICATION SYSTEM, AND MULTI-ANTENNA WIRELESS COMMUNICATION DEVICE
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Abstract
Wireless communication devices A and B perform wireless communication with the MIMO technology. The wireless communication devices A and B determine the optimal diversity combining information that optimizes a diversity reception state through a two-way training signal transfer. This determination can be made based on reception level information, baseband reception IQ information, correlation information between a diversity-combining received signal and a predetermined information sequence, or the like, which are obtained when the diversity combining information with respect to each antenna is sequentially changed. The optimal diversity combining information can be determined by receiving training frames or symbols (the number of antennas+1) times.
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Citations
67 Claims
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1-47. -47. (canceled)
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48. A multi-antenna wireless communication method in which a plurality of antennas for transmission and a plurality of antennas for reception are used and in which wireless communication is performed with MIMO (Multiple Input Multiple Output) technology, the multi-antenna wireless communication method comprising:
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a first step of determining diversity combining information with respect to each signal of the plurality of antennas that optimizes a diversity reception state as a value optimum thereof in each wireless communication device through two-way training signal transfer between the wireless communication devices that perform transmission and reception; a second step of setting the value optimum of each diversity combining information determined by the first step for each wireless communication device; and a third step of enabling each wireless communication device to perform beamforming and diversity combining for a time of data transmission/reception in a state in which the value optimum of each diversity combining information has been set by the second step;
whereinin the first step, in each diversity reception in a plurality of times two-way training signal transfer, diversity combining information that optimizes a diversity reception state is obtained based on training reception information showing a receiving state of a diversity-combining received signal, thereafter diversity combining information is updated by the resulting diversity combining information after diversity reception, thereafter the diversity combining information updated thereby is set, and a training signal is transmitted, thereby determining a set of vectors asymptotically approaching to a set of eigenvectors with respect to a maximum eigenvalue of a correlation matrix of a channel matrix in a transfer between a couple of wireless communication devices that perform transmission and reception as the value optimum of diversity combining information with respect to the couple of wireless communication devices. - View Dependent Claims (52, 56, 59, 60, 61, 62, 63, 64, 67)
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49. A multi-antenna wireless communication method in which a plurality of antennas for transmission and a plurality of antennas for reception are used and in which wireless communication is performed with MIMO (Multiple Input Multiple Output) technology, the multi-antenna wireless communication method comprising:
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a first step of determining diversity combining information with respect to each signal of the plurality of antennas that optimizes a diversity reception state as a value optimum thereof in each wireless communication device through two-way training signal transfer between the wireless communication devices that perform transmission and reception; a second step of setting the value optimum of each diversity combining information determined by the first step for each wireless communication device; and a third step of enabling each wireless communication device to perform beamforming and diversity combining for a time of data transmission/reception in a state in which the value optimum of each diversity combining information has been set by the second step;
whereinthe training signal is composed of a plurality of training sub-signals, and, in the first step, in diversity reception of the training sub-signals, one piece of diversity combining information with respect to each signal of the antennas of the wireless communication devices is sequentially changed, thereafter diversity combining information with respect to a signal of the antenna is updated by diversity combining information having a more excellent receiving state of a diversity-combining received signal before and after a sequential changing operation of the diversity combining information, thereafter the diversity combining information updated thereby is set, and a training signal is transmitted, thereby determining a set of vectors asymptotically approaching to a set of eigenvectors with respect to a maximum eigenvalue of a correlation matrix of a channel matrix in a transfer between a couple of wireless communication devices that perform transmission and reception as the value optimum of diversity combining information with respect to the couple of wireless communication devices. - View Dependent Claims (53, 57, 65, 66)
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50. A multi-antenna wireless communication method in which a plurality of antennas for transmission and a plurality of antennas for reception are used and in which wireless communication is performed with MIMO (Multiple Input Multiple Output) technology, the multi-antenna wireless communication method comprising:
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a first step of determining diversity combining information with respect to each signal of the plurality of antennas that optimizes a diversity reception state as a value optimum thereof in each wireless communication device through plurality of times two-way training signal transfer between the wireless communication devices that perform transmission and reception; a second step of setting the value optimum of each diversity combining information determined by the first step for each wireless communication device; and a third step of enabling each wireless communication device to perform beamforming and diversity combining for a time of data transmission/reception in a state in which the value optimum of each diversity combining information has been set by the second step;
whereinthe training signal is composed of a plurality of training sub-signals, and, in the first step, in diversity reception of the plurality of training sub-signals, diversity combining information with respect to each signal of the antennas of the wireless communication devices are sequentially changed, thereafter diversity combining information that optimizes a receiving state of a diversity-combining received signal is determined based on training reception information showing a receiving state corresponding to each of the diversity combining information, thereafter diversity combining information is updated by the resulting diversity combining information after diversity reception, thereafter the diversity combining information updated thereby is set, and a training signal is transmitted, thereby determining a set of vectors asymptotically approaching to a set of eigenvectors with respect to a maximum eigenvalue of a correlation matrix of a channel matrix in a transfer between a couple of wireless communication devices that perform transmission and reception as the value optimum of diversity combining information with respect to the couple of wireless communication devices. - View Dependent Claims (54, 58)
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51. A multi-antenna wireless communication method in which a plurality of antennas for transmission and a plurality of antennas for reception are used and in which wireless communication is performed with MIMO (Multiple Input Multiple Output) technology, the multi-antenna wireless communication method comprising:
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a first step of determining diversity combining information with respect to each signal of the plurality of antennas that optimizes a diversity reception state as a value optimum thereof in each wireless communication device through a plurality of times training signal transfer between the wireless communication devices that perform transmission and reception; a second step of setting the value optimum of each diversity combining information determined by the first step for each wireless communication device; and a third step of enabling each wireless communication device to perform beamforming and diversity combining for a time of data transmission/reception in a state in which the value optimum of each diversity combining information has been set by the second step;
whereinthe training signal is composed of a plurality of training sub-signals, and, in the first step, in each diversity reception in a plurality of times two-way training sub-signal, diversity combining information with respect to each signal of the antennas of the wireless communication devices is sequentially changed, thereafter diversity combining information that optimizes a receiving state of a diversity-combining received signal is determined based on training reception information showing a receiving state corresponding to each of diversity combining information, thereafter diversity combining information is updated by diversity-reception combining weight information after each diversity reception, thereafter the diversity combining information updated thereby is set, and a training signal is transmitted, thereby determining a set of vectors asymptotically approaching to a set of eigenvectors with respect to a maximum eigenvalue of a correlation matrix of a channel matrix in a transfer between a couple of wireless communication devices that perform transmission and reception as the value optimum of diversity combining information with respect to the couple of wireless communication devices. - View Dependent Claims (55)
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Specification