ZigBee transmit beamforming
A beamforming, wireless network technology, used in transmitter monitoring, space transmit diversity, radio transmission systems, etc., can solve the problem that wireless personal area networks cannot be guaranteed
Active Publication Date: 2021-04-30
QUALCOMM INC
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Problems solved by technology
However, existing techniques for obtaining channel estimates for a specific link between two devices assume that the channel is constant and reciprocal, which is generally not guaranteed in wireless personal area networks (WPANs), where In WPAN, devices use a frequency hopping scheme to communicate
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[0023] Various aspects and embodiments are disclosed in the following description and associated drawings to illustrate specific examples related to illustrative aspects and embodiments. After reading the present disclosure, alternative aspects and embodiments will be apparent to those skilled in the relevant art, and alternative aspects and embodiments can be constructed and implemented without departing from the scope or spirit of the present disclosure. example. Additionally, well-known elements will not be described in detail or may be omitted to avoid obscuring the relevant details of the aspects and embodiments disclosed herein.
[0024] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Likewise, the term "embodiments" does not require that all embodiments include the discussed feature, adva...
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According to various aspects, techniques are provided for enabling implicit and / or explicit transmit (Tx) beamforming in a wireless personal area network. Specifically, when the channels between the beamforming sender and the beamforming receiver are reciprocal (ie, packets are received and transmitted on the same frequency), during certain events, frames, and / or other conditions , enabling implicit transmit beamforming. In such a case, the beamforming transmitter may estimate channel state information (CSI) based on packets received from the beamforming receiver, and use the estimated CSI to steer the beam in a direction toward the beamforming receiver. In the use case where explicit transmit beamforming is implemented, the beamforming receiver can estimate CSI based on packets received from the beamforming sender, and provide the estimated CSI to the beamforming sender, which can then use the The estimated CSI received by the beamforming receiver is used to steer the beam in the direction towards the beamforming receiver.
Description
technical field [0001] In general, various aspects and embodiments described herein relate to wireless communications, and more specifically, various aspects and embodiments described herein relate to signaling that enables transmit (Tx) beamforming in wireless personal area networks (WPANs) . Background technique [0002] In a multi-antenna communication system, multiple (N T ) transmit antennas and one or more (N R ) receiving antennas are usually used for data transmission. N T Each transmit antenna can be used to increase system throughput by sending different data from the antennas or to increase reliability by sending data redundantly. In a multi-antenna communication system, a propagation path exists between each pair of transmit and receive antennas. in N T transmit antennas and N R N T ·N R different transmission paths. These propagation paths may experience different channel conditions (eg, different fading, multipath, and interference effects) and may ac...
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IPC IPC(8): H04B7/06H04B1/713H04B17/11
CPCH04B1/713H04B7/0639H04B7/0695H04B7/0617H04B17/11H04B7/0626H04B7/0632H04B7/0658
Inventor L·卢昂A·哈韦里宁Y·福冈P·登伯尔H·登伯尔J·林斯基T·卡吉尔
Owner QUALCOMM INC