Techniques for generating and detecting a physical random...

Details Techniques for generating and detecting a physical random... Techniques for generating and detecting a physical random...

2008-12-18

2010-11-30

Trost, IV, William (Department: 2472)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

C370S208000, C370S209000, C370S210000, C370S464000, C375S260000

Reexamination Certificate

active

07843970

ABSTRACT:
A technique for detecting a physical random access channel (PRACH) signal includes demasking a received signal with a demasking signal. In this case, the demasking removes a PRACH root index component from the received signal. A fast Fourier transform is performed on the demasked received signal to provide a time-domain signal. At least three peaks of the time-domain signal from all antennas are then power combined. Finally, a determination is made as to whether a preamble index for the PRACH signal matches a known preamble index based on an output power of the time-domain signal at the at least three peaks.

REFERENCES:
patent: 7260054 (2007-08-01), Olszewski
patent: 2001/0008524 (2001-07-01), Ishii et al.
patent: 2008/0165903 (2008-07-01), Hooli et al.
patent: 2008/0310561 (2008-12-01), Song et al.
patent: 2009/0040918 (2009-02-01), Jiang et al.
3GPP TSG-RAN WG4 Meeting #44bis, “Ideal simulation results for PRACH”, R4-071565, Nokia Siemens Networks, Agenda Item: 6.2.3, Shanghai, China, Oct. 8-12, 2007, pp. 1-2.
3GPP TSG-RAN WG4 #44-bis, “LTE PRACH detection performance”, R4-071632, Qualcomm Europe, Agenda item: 6.2.3, Shanghai, P.R. China, Oct. 8-12, 2007, pp. 1-3.
3GPP TSG RAN WG4 meeting #45, “LTE eNode B demodulation results for PRACH with revised simulation assumption”, R4-072087, LG Electronics, Agenda item: 6.2.3.4, Cheju, Korea, Nov. 5-9, 2007, pp. 1-3.

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