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US 8,165,010 B2Granted
OFDMA preambles system and method
AssigneeRuncom Technologies Ltd.
InventorZion Hadad
Life of this patent
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Abstract
A preamble code usable in Orthogonal Frequency Division Multiple Access (OFDMA) for the physical layer (PHY), selected for improved PAPR in a 1024, 512 or 128 FFT OFDMA mode. Tables 2 to 7 detail code sequences having improved PAPR performance. The disclosed codes may be used in cellular wireless.
Claims9
A method of transmitting data with a preamble code usable in Orthogonal Frequency Division Multiple Access (OFDMA) for the physical layer (PHY), comprising:
- selecting an appropriate table of code sequences having improved code performance for selecting preamble codes suitable for 1024, 512 or 128 FFT OFDMA transmission mode, the appropriate pseudo-random codes for achieving an improved PAPR;
- generating, by a communication system, pilots for the OFDMA transmission mode;
- modulating the pilots with the selected preamble codes, by the communication system;
- and
- transmitting the modulated pilots over an OFDMA channel, by the communication system.
2 more elements
A method of transmitting data with a preamble code usable in Orthogonal Frequency Division Multiple Access (OFDMA) for the physical layer (PHY), comprising:
- selecting preamble codes suitable for 1024, 512 or 128 FFT OFDMA transmission mode by generating various pseudo-random codes, evaluating the codes for crest factor, PAPR and cross-correlation and selecting the highest performance codes;
- generating, by a communication system, pilots for the OFDMA transmission mode;
- modulating the pilots with the selected preamble codes, by the communication system;
- and
- transmitting the modulated pilots over an OFDMA channel, by the communication system.
2 more elements
Dependencies are inferred from the claim text.