TECHNICAL FIELD

The technology discussed below relates generally to wireless communication networks, and more particularly, to selecting between antenna switch diversity and cyclic delay diversity in a wireless communication device.

INTRODUCTION

In a wireless communication network, a user equipment (UE) including multiple transmit chains may operate in a cyclic delay diversity (CDD) mode or an antenna switch diversity mode. In CDD mode, the UE may simultaneously transmit on each of the transmit chains using a cyclic delay to produce signals with different cyclic phase/delay on the different transmit chains. In antenna switch diversity mode, the UE may transmit using one of the transmit chains, and the selected transmit chain may be switched between different antennas.

The UE may be configured to implement CDD and/or antenna switch diversity in a cellular network or a device to device (D2D) network. In a D2D network, UEs may signal one another directly, rather than via an intermediary base station or cell. D2D communication networks may utilize direct signaling (e.g., sidelink signaling) to facilitate direct communication between UEs. In some D2D configurations, UEs may further communicate in a cellular system, generally under the control of a base station. Thus, the UEs may be configured for uplink and downlink signaling via a base station and further for sidelink signaling directly between the UEs without transmissions passing through the base station.

BRIEF SUMMARY OF SOME EXAMPLES

The following presents a summary of one or more aspects of the present disclosure, in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated features of the disclosure and is intended neither to identify key or critical elements of all aspects of the disclosure nor to delineate the scope of any or all aspects of the disclosure. Its sole purpose is to present some concepts of one or more aspects of the disclosure in a form as a prelude to the more detailed description that is presented later.

In one example, a method of wireless communication at a wireless communication device is disclosed. The method includes obtaining at least one parameter associated with communication by the wireless communication device over a wireless channel. The at least one parameter can include a channel estimation parameter associated with the wireless channel, a communication parameter associated with at least one communication on the wireless channel, or a combination thereof. The method further includes selecting a transmission mode based on the at least one parameter. The transmission mode can include one of an antenna switch diversity mode or a cyclic delay diversity (CDD) mode. The method further includes transmitting a signal using the selected transmission mode.

Another example provides a wireless communication device in a wireless communication network including a transceiver, a memory, and a processor communicatively coupled to the wireless transceiver and the memory. The processor and the memory can be configured to obtain at least one parameter associated with communication by the wireless communication device over a wireless channel. The at least one parameter includes a channel estimation parameter associated with the wireless channel, a communication parameter associated with at least one communication on the wireless channel, or a combination thereof. The processor and the memory can further be configured to select a transmission mode based on the at least one parameter. The transmission mode can include one of an antenna switch diversity mode or a cyclic delay diversity (CDD) mode. The processor and the memory can further be configured to transmit a signal using the selected transmission mode via the transceiver.

Another example provides a wireless communication device in a wireless communication network. The wireless communication device includes means for obtaining at least one parameter associated with communication by the wireless communication device over a wireless channel. The at least one parameter can include a channel estimation parameter associated with the wireless channel, a communication parameter associated with at least one communication on the wireless channel, or a combination thereof. The wireless communication device further includes means for selecting a transmission mode based on the at least one parameter. The transmission mode can include one of an antenna switch diversity mode or a cyclic delay diversity (CDD) mode. The wireless communication device further includes means transmitting a signal using the selected transmission mode.

Another example provides an article of manufacture for use by a wireless communication device in a wireless communication network. The article includes a non-transitory computer-readable medium having stored therein instructions executable by one or more processors of the wireless communication device to obtain at least one parameter associated with communication by the wireless communication device over a wireless channel. The at least one parameter can include a channel estimation parameter associated with the wireless channel, a communication parameter associated with at least one communication on the wireless channel, or a combination thereof. The non-transitory computer-readable medium further has stored therein instructions executable by the one or more processors of the wireless communication device to select a transmission mode based on the at least one parameter. The transmission mode can include one of an antenna switch diversity mode or a cyclic delay diversity (CDD) mode. The non-transitory computer-readable medium further has stored therein instructions executable by the one or more processors of the wireless communication device to transmit a signal using the selected transmission mode.

These and other aspects will become more fully understood upon a review of the detailed description, which follows. Other aspects, features, and embodiments will become apparent to those of ordinary skill in the art, upon reviewing the following description of specific, exemplary embodiments of in conjunction with the accompanying figures. While features may be discussed relative to certain embodiments and figures below, all embodiments can include one or more of the advantageous features discussed herein. In other words, while one or more embodiments may be discussed as having certain advantageous features, one or more of such features may also be used in accordance with the various embodiments discussed herein. In similar fashion, while exemplary embodiments may be discussed below as device, system, or method embodiments such exemplary embodiments can be implemented in various devices, systems, and methods.

