Softer and Soft Handoff in an Orthogonal Frequency Division Wireless Communication System
First Claim
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1. A wireless communication apparatus, comprising:
- a plurality of antenna groups;
a memory that stores a plurality of pilot pattern indicators each corresponding to a plurality of pilot symbols and corresponding to one or more of the plurality of antenna groups; and
a circuit coupled with the plurality of antenna groups that selects a pilot pattern indicator of the plurality of pilot pattern indicators to be transmitted to a wireless communication device based upon whether the wireless communication device is in handoff.
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Abstract
Transmission patterns for pilot symbols transmitted from a mobile station or base station are provided. The patterns may be selected according to a location of the mobile station with respect to one or more antennas are provided. In some aspects, the pattern may be selected based upon the distance between the mobile station and the one or more antennas. In other aspect, the pattern may be based upon whether the mobile station is in handoff.
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Citations
29 Claims
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1. A wireless communication apparatus, comprising:
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a plurality of antenna groups; a memory that stores a plurality of pilot pattern indicators each corresponding to a plurality of pilot symbols and corresponding to one or more of the plurality of antenna groups; and a circuit coupled with the plurality of antenna groups that selects a pilot pattern indicator of the plurality of pilot pattern indicators to be transmitted to a wireless communication device based upon whether the wireless communication device is in handoff. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of selecting a pilot pattern for a wireless communication device comprising:
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determining whether a wireless communication device is in handoff; selecting a pilot pattern of a plurality of pilot patterns to be utilized for transmission by the wireless communication device based upon whether the wireless communication device is in handoff; and transmitting an indicator of the pilot pattern to the wireless communication device. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A wireless communication apparatus, comprising:
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a plurality of antenna groups each of which corresponds to one of a plurality of sectors of a cell in which a wireless communication apparatus is capable of communication; a memory that stores a plurality of indicators each corresponding to a pilot pattern of a plurality of pilot patterns, at least one of the plurality of pilot patterns corresponding to a handoff; and a circuit coupled with the plurality of antenna groups and the memory, the circuit determining if a pilot pattern received at one or more of the antenna groups corresponds to the at least one pilot pattern and combining processed data symbols, associated with the at least one pilot pattern, received at the one or more antenna groups. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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Specification