Radio transmission device and radio transmission method
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYuichi Hagiwara, Yoichi Maeda
Life of this patent
Estimating the term…
Abstract
An RV pattern selection section (103) stores at least two RV parameter tables, for QPSK and 16QAM, selects a corresponding RV parameter Xrv from the RV parameter tables based on a correlation between an estimated transmission count input from a transmission count estimation section (101) and a coding rate input from a coding rate calculation section (102) and outputs the RV parameter Xrv to a channel coding section (104). The channel coding section (104) changes a rate matching pattern of transmission data and constellation rearrangement (applicable to 16QAM only) based on the RV parameter Xrv input from the RV pattern selection section (103).
Claims8
A radio transmission apparatus based on a hybrid ARQ scheme that retransmits transmission data to a reception apparatus based on a retransmission request from said reception apparatus, selecting retransmission parameters in such a way that reception power of initial transmission data and all said retransmission data increases when said reception apparatus receives and combines the retransmission data.
A radio communication apparatus based on a hybrid ARQ scheme that retransmits transmission data to a reception apparatus based on a retransmission request from said reception apparatus, comprising:
- a transmission count estimation section that estimates a transmission count based on a retransmission request from said reception apparatus;
- a coding rate calculation section that calculates a coding rate based on a set modulation scheme, transmission data and the number of codes;
- a selection section that selects retransmission parameters based on said set modulation scheme, the estimated transmission count estimated by said transmission count estimation section and coding rate calculated by said coding rate calculation section in such a way that reception power of all retransmission data at said reception apparatus increases;
- and
- a coding section that codes said transmission data based on the selected retransmission parameter selected by said selection section and generates retransmission data.
A radio transmission apparatus based on a hybrid ARQ scheme that retransmits transmission data to a reception apparatus based on a retransmission request from said reception apparatus, comprising:
- a transmission count estimation section that estimates a transmission count based on a retransmission request from said reception apparatus;
- a coding rate calculation section that calculates a coding rate based on a set modulation scheme, transmission data and the number of codes;
- an RV estimated transmission count setting section that sets an estimated transmission count for a retransmission parameter based on said set modulation scheme, estimated transmission count estimated by said transmission count estimation section and coding rate calculated by said coding rate calculation section;
- a selection section that selects retransmission parameters based on said set modulation scheme, the RV estimated transmission count for retransmission parameters set by said RV estimated transmission count setting section and coding rate calculated by said coding rate calculation section in such a way that reception power of all retransmission data at said reception apparatus increases;
- and
- a coding section that codes said transmission data based on the retransmission parameter selected by said selection section and generates retransmission data.
A radio transmission method based on a hybrid ARQ scheme that retransmits transmission data to a reception apparatus based on a retransmission request from said reception apparatus, comprising a step of selecting a retransmission parameter in such a way that reception power of initial transmission data and all said retransmission data increases when said reception apparatus receives and combines the retransmission data.
A radio transmission method based on a hybrid ARQ scheme that retransmits transmission data to a reception apparatus based on a retransmission request from said reception apparatus, comprising:
- a transmission count estimation step of estimating a transmission count based on a retransmission request from said reception apparatus;
- a coding rate calculation step of calculating a coding rate based on a set modulation scheme, transmission data and the number of codes;
- a selection step of selecting retransmission parameters based on said set modulation scheme, said estimated transmission count and said calculated coding rate in such a way that reception power of all retransmission data at said reception apparatus increases;
- and
- a coding step of coding said transmission data based on said selected retransmission parameter and generating retransmission data.
A radio transmission method based on a hybrid ARQ scheme that retransmits transmission data to a reception apparatus based on a retransmission request from said reception apparatus, comprising:
- a transmission count estimation step of estimating a transmission count based on a retransmission request from said reception apparatus;
- a coding rate calculation step of calculating a coding rate based on a set modulation scheme, transmission data and the number of codes;
- an RV estimated transmission count setting step of setting an RV estimated transmission count for a retransmission parameter based on said set modulation scheme, said estimated RV estimated transmission count and said calculated coding rate;
- a selection step of selecting retransmission parameters based on said set modulation scheme, said RV estimated transmission count for said set retransmission parameter and said calculated coding rate in such a way that reception power of all retransmission data at said reception apparatus increases;
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- a coding step of coding said transmission data based on said selected retransmission parameter and generating retransmission data.
Dependencies are inferred from the claim text.