Method and system for CQI/PMI feedback for precoded MIMO systems utilizing differential codebooks
First Claim
1. A method for processing communication signals, the method comprising:
- generating, using a circuit, one or more feedback messages for transmission over one or more Channel Quality Indicator (CQI) reporting units based on at least channel state information associated with said one or more CQI reporting units;
generating one or more differential feedback messages for transmission over one or more Pre-coding Matrix Index (PMI) reporting units based on at least channel state information associated with said one or more PMI reporting units, wherein said one or more PMI reporting units span a useable bandwidth; and
adjusting a size, in time or frequency, of said one or more CQI reporting units or said one or more PMI reporting units based on a delay spread, doppler spread, or angular spread.
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Abstract
Aspects of a method and system for CQI/PMI feedback for precoded MIMO systems utilizing differential codebooks may include generating one or more feedback messages for one or more Channel Quality Indicator (CQI) reporting units based on at least channel state information associated with the one or more CQI reporting units. One or more differential feedback messages may be generated for one or more Pre-coding Matrix Index (PMI) reporting units based on at least channel state information associated with the one or more PMI reporting units, wherein the one or more PMI reporting units span a useable bandwidth. A bandwidth and a feedback period may be assigned to each of the one or more CQI reporting units and the one or more PMI reporting units to define the one or more CQI reporting units and the one or more PMI reporting units.
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Citations
23 Claims
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1. A method for processing communication signals, the method comprising:
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generating, using a circuit, one or more feedback messages for transmission over one or more Channel Quality Indicator (CQI) reporting units based on at least channel state information associated with said one or more CQI reporting units; generating one or more differential feedback messages for transmission over one or more Pre-coding Matrix Index (PMI) reporting units based on at least channel state information associated with said one or more PMI reporting units, wherein said one or more PMI reporting units span a useable bandwidth; and adjusting a size, in time or frequency, of said one or more CQI reporting units or said one or more PMI reporting units based on a delay spread, doppler spread, or angular spread. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 22)
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12. A system for processing communication signals, the system comprising:
one or more circuits, which enable; generation of one or more feedback messages for transmission over one or more Channel Quality Indicator (CQI) reporting units based on at least channel state information associated with said one or more CQI reporting units; generation of one or more differential feedback messages for transmission over one or more Pre-coding Matrix Index (PMI) reporting units based on at least channel state information associated with said one or more PMI reporting units, wherein said one or more PMI reporting units span a useable bandwidth; and adjustment of a size, in time or frequency, of said one or more CQI reporting units or said one or more PMI reporting units based on a delay spread, doppler spread, or angular spread. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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23. A method comprising:
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generating, using a circuit, one or more feedback messages for transmission over one or more Channel Quality Indicator (CQI) reporting units based on at least channel state information associated with said one or more CQI reporting units; generating one or more differential feedback messages for transmission over one or more Pre-coding Matrix Index (PMI) reporting units based on at least channel state information associated with said one or more PMI reporting units, wherein said one or more PMI reporting units span a useable bandwidth; and dynamically adjusting a bandwidth of said one or more CQI reporting units or said one or more PMI reporting units based on a delay spread related to a distribution of multipath components.
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Specification