Interference signal canceling apparatus and interference signal canceling method
OwnerKenichi Miyoshiinventor
Life of this patent
Estimating the term…
Abstract
Block likelihood calculators 106-1 to 106-n calculate likelihood of each symbol included in a received signal, thereafter setting likelihood for rank decision from the calculated likelihood on a predetermined block-by-block basis. A rank decider 109 decides a rank with respect to each symbol included in the predetermined block based on the set block likelihood on the block-by-block basis. A re-spreader 110 spreads the symbol whose rank is the highest on the block-by-block basis, and a subtracter 111 removes the spread symbol from the received signal on the block-by-block basis.
Claims7
An interference signal canceling apparatus comprising:
- a calculator for calculating likelihood of each symbol included in a received signal;
- a setter for setting likelihood for rank decision from the calculated likelihood on a predetermined block-by-block basis;
- a decider for deciding a rank with respect to each block based on the set likelihood;
- a spreader for spreading a symbol having the highest rank on the block-by-block basis;
- and
- a remover for removing the spread symbol from the received signal on the block-by-block basis.
A mobile station apparatus having an interference signal canceling apparatus, said interference signal canceling apparatus comprising:
- a calculator for calculating likelihood of each symbol included in a received signal;
- a setter for setting likelihood for rank decision from the calculated likelihood on a predetermined block-by-block basis;
- a decider for deciding a rank with respect to each block based on the set likelihood;
- a spreader for spreading a symbol having the highest rank on the block-by-block basis;
- and
- a remover for removing the spread symbol from the received signal on the block-by-block basis.
A base station apparatus having an interference signal canceling apparatus, said interference signal canceling apparatus comprising:
- a calculator for calculating likelihood of each symbol included in a received signal;
- a setter for setting likelihood for rank decision from the calculated likelihood on a predetermined block-by-block basis;
- a decider for deciding a rank with respect to each block based on the set likelihood;
- a spreader for spreading a symbol having the highest rank on the block-by-block basis;
- and
- a remover for removing the spread symbol from the received signal on the block-by-block basis.
An interference signal canceling method comprising the steps of:
- calculating likelihood of each symbol included in a received signal;
- setting likelihood for rank decision from the calculated likelihood on a predetermined block-by-block basis;
- deciding a rank with respect to each block based on the set likelihood;
- spreading a symbol having the highest rank on the block-by-block basis;
- and
- removing the spread symbol from the received signal on the block-by-block basis.
Dependencies are inferred from the claim text.