Arrangement and Method for Channel Mapping in a Wireless Communication System
First Claim
11. An arrangement for channel demapping in a wireless communication system, the arrangement comprising:
- first and second deinterleaving means for applying deinterleaving functions to respectively first and second channels to produce a bit sequence representative of symbols mapped to respectively the first and second channels,the first and second deinterleaving means being arranged to deinterleave symbols mapped in a predetermined scheme.
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Accused Products
Abstract
An arrangement and method for channel mapping in a UTRA TDD HSDPA wireless communication system by applying interleaving functions in first (530) and second (540) interleaving means to a bit sequence to produce symbols for mapping to physical channels, the first and second interleaving means being arranged to map symbols from respectively systematic and parity bits in a predetermined scheme, e.g., mapping symbols in a forward direction when a channel has an even index number, and in a reverse direction when a channel has an odd index number. The symbols may comprise bit-pairs, each of a systematic bit and parity bit.
Systematic bits are preferably mapped to high reliability bit positions in TDD HSDPA, achieving a performance gain of between 0.2 dB and 0.5 dB. The forwards/reverse mapping allows a degree of interleaving that improves system performance in fading channels or channels disturbed by short time period noise or interference.
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Citations
47 Claims
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11. An arrangement for channel demapping in a wireless communication system, the arrangement comprising:
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first and second deinterleaving means for applying deinterleaving functions to respectively first and second channels to produce a bit sequence representative of symbols mapped to respectively the first and second channels, the first and second deinterleaving means being arranged to deinterleave symbols mapped in a predetermined scheme. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 44, 45, 46)
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21. A method for channel mapping in a wireless communication system, the method comprising:
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applying interleaving functions in first and second interleaving means to a bit sequence to produce symbols for mapping to respectively first and second channels, the first and second interleaving means being arranged to map symbols in a predetermined scheme. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 43)
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31. A method for channel demapping in a wireless communication system, the method comprising:
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applying deinterleaving functions in first and second deinterleaving means to respectively first and second channels to produce bit sequences representative of symbols mapped to respectively the first and second channels, the first and second deinterleaving means deinterleaving symbols mapped in a predetermined scheme. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 47)
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41-1. A base station for use in a wireless communication system comprising an arrangement as claimed in claim 1.
Specification