Broadcast burst using spatial diversity for a radio communications system
First Claim
Patent Images
1. A method comprising:
- sending a first time segment of a broadcast channel burst using a first set of unchanging spatial parameters from an array of antenna elements; and
sending a second time segment of the broadcast channel burst using a second set of different unchanging spatial parameters from the array of antenna elements.
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Abstract
A method and apparatus are provided that allows a single spatially directed broadcast burst to serve users throughout a base station sector. In one embodiment, the invention includes sending a first segment of a broadcast channel burst using a first set of unchanging spatial parameters from an array of antenna elements, and sending a second segment of the broadcast channel burst using a second set of different unchanging spatial parameters from the array of antenna elements.
37 Citations
55 Claims
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1. A method comprising:
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sending a first time segment of a broadcast channel burst using a first set of unchanging spatial parameters from an array of antenna elements; and sending a second time segment of the broadcast channel burst using a second set of different unchanging spatial parameters from the array of antenna elements. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method comprising:
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sending a first segment of a broadcast channel burst using a first set of unchanging spatial parameters from an array of antenna elements; sending a second segment of the broadcast channel burst using a second set of different unchanging spatial parameters from the array of antenna elements; and sending a preamble segment of the broadcast channel burst using a third set of different unchanging spatial parameters from the array of antenna elements, the preamble segment being adjacent to and before the first segment.
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14. A method comprising:
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sending a first segment of a broadcast channel burst using a first set of unchanging spatial parameters from an array of antenna elements; sending a second segment of the broadcast channel burst using a second set of different unchanging spatial parameters from the array of antenna elements, wherein the first and second segments each contain a sequence of symbols, the symbols for each segment being selected from a code word of a set of code words. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A machine-readable medium having stored thereon data representing instructions which, when executed by a machine, cause the machine to perform operations comprising:
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sending a first time segment of a broadcast channel burst using a first set of unchanging spatial parameters from an array of antenna elements; and sending a second time segment of the broadcast channel burst using a second set of different unchanging spatial parameters from the array of antenna elements. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A broadcast channel burst comprising:
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a first segment corresponding to a first set of unchanging spatial parameters for an array of antenna elements; and a second segment corresponding to a second set of different unchanging spatial parameters for the array of antenna elements. - View Dependent Claims (37, 38, 39, 40, 41)
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42. A broadcast channel burst comprising:
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a first segment corresponding to a first set of unchanging spatial parameters for an array of antenna elements; a second segment corresponding to a second set of different unchanging spatial parameters for the array of antenna elements, wherein the first and second segments each contain a sequence of symbols, the symbols for each segment being selected from a code word of a set of code words. - View Dependent Claims (43, 44, 45, 46)
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47. A cellular base station comprising:
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register to store a plurality of code words; a processor to select one of the plurality of code words and generate a first segment of a broadcast channel burst by scrambling the code word with a first scrambling sequence and to generate a second segment of a broadcast channel burst by scrambling the code word with a second scrambling sequence; and a transmitter to send the first segment using a first set of unchanging spatial parameters, the second segment using a second set of different unchanging spatial parameters from an array of antenna elements. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 55)
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Specification