Method for deinterleaving ofdm signals and apparatus using the same
AssigneeRalink Technology Corporation
InventorsSHIH YI YEH, JIA CHING LEE
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Abstract
An apparatus for deinterleaving OFDM signals comprises a block deinterleaving memory, a computing module, a processed-tone buffer and a subcarrier rotator. The block deinterleaving memory is configured to store unprocessed symbols of the OFDM signals. The computing module is configured to access the block deinterleaving memory in accordance with the order of a first interleaving action for the OFDM signals and to compute thereafter. The processed-tone buffer is configured to store processed symbols of the OFDM signals. The subcarrier rotator is configured to access the processed-tone buffer and to perform a second interleaving action for the OFDM signals.
Claims20
An apparatus for deinterleaving orthogonal frequency division multiplexing (OFDM) signals, comprising:
- a block deinterleaving memory configured to store unprocessed symbols of the OFDM signals;
- a computing module configured to access the block deinterleaving memory in accordance with an order of a first interleaving action for the OFDM signals and to compute thereafter;
- a processed-tone buffer configured to store processed symbols of the OFDM signals;
- and
- a subcarrier rotator configured to access the processed-tone buffer and to perform a second interleaving action for the OFDM signals.
A method for deinterleaving orthogonal frequency division multiplexing (OFDM) signals, comprising the steps of:
- receiving unprocessed OFDM signals in a frequency domain and storing the unprocessed OFDM signals into a block deinterleaving memory;
- accessing symbols of the OFDM signals in a direction perpendicular to a direction in which the unprocessed OFDM signals are stored into the block deinterleaving memory;
- processing symbols of the accessed OFDM signals;
- storing the processed symbols into a processed-tone buffer;
- and
- deinterleaving bits of the processed symbols in the processed-tone buffer.
A method for deinterleaving orthogonal frequency division multiplexing (OFDM) signals, comprising the steps of:
- receiving unprocessed OFDM signals in a frequency domain and storing the unprocessed OFDM signals into a block deinterleaving memory;
- accessing the OFDM signals from the block deinterleaving memory, wherein any symbol of the OFDM signals is accessed only once;
- processing symbols of the OFDM signals and then storing the processed symbols in a processed-tone buffer;
- and
- deinterleaving the processed symbols in the processed-tone buffer, wherein the number of deinterleaving actions for symbols of the OFDM signals is equal to the number of bits of the symbols.
Dependencies are inferred from the claim text.