Apparatus and method for subcarrier scrambling
AssigneeIndustrial Technology Research Institute
InventorsChia-Lung Tsai, Jen-Yuan Hsu, Pang-An Ting, Yu-Tao Hsieh
Life of this patent
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Abstract
A subcarrier scrambling method for use in a transmitter with multiple subcarriers, the transmitter being configured to allocate pilot symbols and data symbols for each of a plurality of resource units (RUs). The method includes: applying, for each of the plurality of RUs, a first intra RU sequence to the pilot symbols, to thereby generate a plurality of scrambled pilot symbols; applying, for each of the plurality of RUs, a second intra RU sequence to the data symbols, to thereby generate a plurality of scrambled data symbols; and combining the plurality of scrambled pilot symbols and the plurality of scrambled data symbols to form the plurality of RUs.
Claims18
A subcarrier scrambling method for use in a transmitter with multiple subcarriers, the transmitter being configured to allocate pilot symbols and data symbols for each of a plurality of resource units (RUs), the method comprising:
- applying, for each of the plurality of RUs, a first intra RU sequence to the pilot symbols, to thereby generate a plurality of scrambled pilot symbols;
- applying, for each of the plurality of RUs, a second intra RU sequence to the data symbols, to thereby generate a plurality of scrambled data symbols;
- and
- combining the plurality of scrambled pilot symbols and the plurality of scrambled data symbols to form the plurality of RUs;
- wherein the transmitter is configured to serve a cell including one or more segments, the method further comprising:
- generating a first random sequence based on a number of segments in the cell;
- and
- generating the first intra RU sequence based on the first random sequence and a cell identification number of the cell.
Subcarrier scrambling apparatus for use in a transmitter with multiple subcarriers, the transmitter being configured to allocate pilot symbols and data symbols for each of a plurality of resource units (RUs), the apparatus comprising:
- a first multiplier configured to apply, for each of the plurality of RUs, a first intra RU sequence to the pilot symbols, to thereby generate a plurality of scrambled pilot symbols;
- a second multiplier configured to apply, for each of the plurality of RUs, a second intra RU sequence to the data symbols, to thereby generate a plurality of scrambled data symbols;
- and
- a combiner configured to combine the plurality of scrambled pilot symbols and the plurality of scrambled data symbols to form the plurality of RUs;
- wherein the transmitter is configured to serve a cell including one or more segments, the apparatus further comprising:
- a first pseudo random binary sequence (PRBS) generator configured to generate a first random sequence, based on a number of segments in the cell;
- and
- a first sequence optimizer configured to optimize the first random sequence to generate the first intra RU sequence, based on a cell identification number of the cell.
Dependencies are inferred from the claim text.