Generation method and generator for pseudo-random noise sequence with fast sliding phase

A technology of pseudo-random noise and sequence generators, applied in random number generators, pulse generation with predetermined statistical distribution of parameters, multiplex communication, etc., can solve problems such as complex logical relationships, and achieve simple logical relationships and corresponding The effect of simple relationship and small phase delay

Inactive Publication Date: 2005-05-25
NATIONZ TECH INC
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Problems solved by technology

[0006] 3) More logic circuits are used in the circuit, and the logic relationship is more complicated

Method used

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  • Generation method and generator for pseudo-random noise sequence with fast sliding phase
  • Generation method and generator for pseudo-random noise sequence with fast sliding phase
  • Generation method and generator for pseudo-random noise sequence with fast sliding phase

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Embodiment Construction

[0032] The following is based on Figure 1-Figure 4 And table 1, provides two embodiments of the present invention:

[0033] The method that the generation phase sliding PN sequence that the present invention proposes comprises the following steps:

[0034] 1) According to the characteristic polynomial or recursive polynomial generation cycle of PN sequence is 2 N The longest linear PN sequence of -1,

[0035] 2) Lengthen the period 2 of the longest linear PN sequence above N -1 is 2 N , detect N-1 consecutive "0", when the last "0" is output, stop the clock of the shift register for one cycle, so that a "0" output can be added to make N-1 consecutive "0" Change to N consecutive "0", also increase the period of the sequence to 2 N ,

[0036] 3) Use N-bit width, 2 N bit-length RAM memory stores the shift register's 2 N The initial state is the state of the shift register when N consecutive "0"s are output, and this state is stored in the zero address space of the memory...

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Abstract

The shift register state of PN sequence with N continuous "0" states as initial value and generating period of 2 to the power n is written into memory in order, the counter is then started, and the shift register outputs PN sequence by using N continuous "0" states as initial time. While needing sliding, the sum of counted value and sliding phase data is used to address so as to take memory content and feed it into the shift register and required PN sequence is output in the next clock period. The generator includes PN sequence forming circuit, period lengthening circuit, memory and phase sliding control circuit.

Description

technical field [0001] The invention relates to a baseband processing device and a manufacturing method thereof in a Code Division Multiple Access (CDMA) communication system. N PN (pseudo-random noise) sequence generator, the PN sequence generator includes a period of 2 N The longest linear PN sequence generator of -1, which increases the N-1 consecutive "0"s in the PN sequence to N consecutive "0"s through a sequence lengthening circuit, so that the period of the PN sequence is lengthened to 2 N , and more usefully, the PN sequence generator can realize fast phase sliding under the control of the input signal. Background technique [0002] At present, in the CDMA communication system, whether it is the sending end of the forward channel or the reverse channel, in order to ensure the orthogonality of the I (in-phase series) and Q (orthogonal series) channels, a period of 2 is used. N Therefore, in order to effectively and quickly capture the channel sent by the sending en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F7/58H03K3/84H04L7/00
Inventor 徐剑锋
Owner NATIONZ TECH INC
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