Using precoding vector switching in uplink shared channel
First Claim
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1. A method for wireless data communication, comprising:
- determining whether to operate in a frequency hopping mode based on a received frequency hopping value;
transmitting, by a processor, in a first subframe, a first plurality of data transmissions over two or more slots of the first subframe using a first plurality of precoding vectors based on whether it is determined to operate in the frequency hopping mode,wherein more than one of the first plurality of precoding vectors are used in each slot of the two or more slots,wherein when not operating in the frequency hopping mode, the first plurality of precoding vectors are the same over the two or more slots in the first subframe,wherein when operating in the frequency hopping mode, the first plurality of precoding vectors are different over the two or more slots in the first subframe, more than one precoding vector used in a first slot in the two or more slots correspond to a first frequency, and more than one precoding vector used in a second slot in the two or more slots correspond to a second frequency; and
switching among the first plurality of precoding vectors that are different over the two or more slots, wherein the switching comprises hopping from one of the more than one precoding vector used in the first slot corresponding to the first frequency to one of the more than one precoding vector used in the second slot corresponding to the second frequency.
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Abstract
Methods and apparatuses are provided that include providing transmit diversity for data channel transmissions. Different precoding vectors can be used over different slots of a given subframes to precode corresponding signals. The precoding vectors, in one example, can be orthogonal. In addition, using the different precoding vectors can be determined based on a user equipment receiving an indicator from a base station receiving the data channel transmissions of whether to use frequency hopping over the slots. Moreover, precoding vectors used to precode data channel transmissions can additionally or alternatively vary across subframes.
27 Citations
36 Claims
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1. A method for wireless data communication, comprising:
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determining whether to operate in a frequency hopping mode based on a received frequency hopping value; transmitting, by a processor, in a first subframe, a first plurality of data transmissions over two or more slots of the first subframe using a first plurality of precoding vectors based on whether it is determined to operate in the frequency hopping mode, wherein more than one of the first plurality of precoding vectors are used in each slot of the two or more slots, wherein when not operating in the frequency hopping mode, the first plurality of precoding vectors are the same over the two or more slots in the first subframe, wherein when operating in the frequency hopping mode, the first plurality of precoding vectors are different over the two or more slots in the first subframe, more than one precoding vector used in a first slot in the two or more slots correspond to a first frequency, and more than one precoding vector used in a second slot in the two or more slots correspond to a second frequency; and switching among the first plurality of precoding vectors that are different over the two or more slots, wherein the switching comprises hopping from one of the more than one precoding vector used in the first slot corresponding to the first frequency to one of the more than one precoding vector used in the second slot corresponding to the second frequency. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for transmitting wirelessly using transmit diversity, comprising:
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means for determining whether to operate in a frequency hopping mode based on a received frequency hopping value; and means for transmitting, in a first subframe, a first plurality of data transmissions over two or more slots of the first subframe using a first plurality of precoding vectors based on whether the means for determining determines to operate in the frequency hopping mode, wherein more than one of the first plurality of precoding vectors are used in each slot of the two or more slots, wherein when not operating in the frequency hopping mode, the first plurality of precoding vectors are the same over the two or more slots in the first subframe, wherein when operating in the frequency hopping mode, the first plurality of precoding vectors are different over the two or more slots in the first subframe, more than one precoding vector used in a first slot in the two or more slots correspond to a first frequency, and more than one precoding vector used in a second slot in the two or more slots correspond to a second frequency, and wherein the means for determining further comprises means for selecting among the first plurality of precoding vectors that are different over the two or more slots, wherein the means for selecting is configured to hop from one of the more than one precoding vector used in the first slot corresponding to the first frequency to one of the more than one precoding vector used in the second slot corresponding to the second frequency. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A computer program product for transmitting wirelessly using transmit diversity, comprising:
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a non-transitory computer-readable medium comprising; code for causing at least one computer to determine whether to operate in a frequency hopping mode based on a received frequency hopping value; code for causing the at least one computer to transmit, in a first subframe, a first plurality of data transmissions over two or more slots of the first subframe using a first plurality of precoding vectors based on whether the code for causing the at least one computer to determine determines to operate in the frequency hopping mode, wherein more than one of the first plurality of precoding vectors are used in each slot of the two or more slots, wherein when not operating in the frequency hopping mode, the first plurality of precoding vectors are the same over the two or more slots in the first subframe, wherein when operating in the frequency hopping mode, the first plurality of precoding vectors are different over the two or more slots in the first subframe, more than one precoding vector used in a first slot in the two or more slots correspond to a first frequency, and more than one precoding vector used in a second slot in the two or more slots correspond to a second frequency; and code for causing the at least one computer to switch among the first plurality of precoding vectors that are different over the two or more slots, wherein the code for causing the at least one computer to switch is configured to hop from one of the more than one precoding vector used in the first slot corresponding to the first frequency to one of the more than one precoding vector used in the second slot corresponding to the second frequency. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. A user equipment (UE) supporting uplink transmit diversity, comprising:
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at least one processor; and a memory coupled to the at least one processor, wherein the at least one processor is configured to; determine whether to operate in a frequency hopping mode based on a received frequency hopping value; transmit, in a first subframe, a first plurality of data transmissions over two or more slots of the first subframe using a first plurality of precoding vectors based on whether the at least one processor determines to operate in the frequency hopping mode, wherein more than one of the first plurality of precoding vectors are used in each slot of the two or more slots, wherein when not operating in the frequency hopping mode, the first plurality of precoding vectors are the same over the two or more slots in the first subframe, wherein when operating in the frequency hopping mode, the first plurality of precoding vectors are different over the two or more slots in the first subframe, more than one precoding vector used in a first slot in the two or more slots correspond to a first frequency, and more than one precoding vector used in a second slot in the two or more slots correspond to a second frequency; and switch among the first plurality of precoding vectors that are different over the two or more slots, wherein the switching comprises hopping from one of the more than one precoding vector used in the first slot corresponding to the first frequency to one of the more than one precoding vector used in the second slot corresponding to the second frequency. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36)
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Specification