CN102170297A - PN (pseudo noise) offset obtaining device and method for CDMA (code division multiple access) system - Google Patents

PN (pseudo noise) offset obtaining device and method for CDMA (code division multiple access) system Download PDF

Info

Publication number
CN102170297A
CN102170297A CN2011101028049A CN201110102804A CN102170297A CN 102170297 A CN102170297 A CN 102170297A CN 2011101028049 A CN2011101028049 A CN 2011101028049A CN 201110102804 A CN201110102804 A CN 201110102804A CN 102170297 A CN102170297 A CN 102170297A
Authority
CN
China
Prior art keywords
module
pn
sequence
offset
signal
Prior art date
Application number
CN2011101028049A
Other languages
Chinese (zh)
Inventor
季胡清
宋葛
杜守田
洪杭迪
王荣
金淮东
Original Assignee
三维通信股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三维通信股份有限公司 filed Critical 三维通信股份有限公司
Priority to CN2011101028049A priority Critical patent/CN102170297A/en
Publication of CN102170297A publication Critical patent/CN102170297A/en

Links

Abstract

The invention relates to a PN (pseudo noise) offset obtaining device and a method thereof for a CDMA (code division multiple access) system. According to the method, base station PN offset is recognized by receiving a base station signal in the CDMA system, and the device for the method comprises an antenna module, a down mixing module, an A/D (analog to digital) module, a DDC (digital down conversion) module, a base band processing module and a PN obtaining module. A signal which is sent by the base station is received by the antenna module and is processed by the down mixing module, the A/D module, the DDC module and the base band processing module in sequence, the PN offset is obtained by a sequence which is processed by the base band processing module through an algorithm which is specified in a PN offset obtaining module, and a corresponding PN sequence is generated according to the obtained PN offset. The method has the beneficial effects that compared with a traditional de-synchronizing channel method which obtains the PN offsets, the method is simple and is easy to realize.

Description

一种CDMA系统PN偏置获取装置及方法 PN offsets in a CDMA system acquisition apparatus and method

技术领域 FIELD

[0001] 本发明涉及CDMA通信技术领域的PN偏置获取技术,主要是一种CDMA系统PN偏置获取装置及方法。 [0001] CDMA communication relates to the art of the present invention PN offset acquisition techniques, notably an apparatus and method PN offset acquired CDMA system.

背景技术 Background technique

[0002] CDMA系统中,通过WALASH码进行扩频,通过PN短码序列对扩频后序列进行复扰码,基站使用相同的PN短码序列,但是,不同的基站采用的PN短码序列偏置不同。 [0002] CDMA systems, by WALASH code spreading, multiplexes the scrambling code spreading sequences PN short code sequence, the base station uses the same PN short code sequence, however, short code PN sequences of base stations using different bias different settings. 通过不同的PN短码序列偏置可以区分基站。 The base station can be distinguished by different short code sequence offset PN.

[0003] 针对扩展速率1来说,PN序列生成多项式为: [0003] For growth rate is 1, PN sequence generator polynomial is:

[0004] P1(X) = X15+X13+X9+X8+X7+X5+1 (1) [0004] P1 (X) = X15 + X13 + X9 + X8 + X7 + X5 + 1 (1)

[0005] Pq (χ) = x15+x12+xn+x10+x6+x5+x4+x3+l (2) [0005] Pq (χ) = x15 + x12 + xn + x10 + x6 + x5 + x4 + x3 + l (2)

[0006] 其中,P1(X)为I路生成多项式,PQ(x)为Q路生成多项式,基于上述多项式的线性反馈移位寄存器序列i (η)和q(n)的最大长度为215_1,并且通过下列递推公式导出: [0006] wherein, P1 (X) of the I generator polynomial, PQ (x) is a generating polynomial Q channel, based on the maximum length of the linear feedback shift register sequences above polynomial i ([eta]) and q (n) is 215_1, and exported by the following recurrence formula:

[0007] [0007]

Figure CN102170297AD00031

[0008] 以及 [0008] and

[0009] [0009]

Figure CN102170297AD00032

[0010] 其中,⑶式基于生成多项式P1(X), (4)式基于生成多项式Pq(X),i (η)和q(n)为二进制('0,和'1,),并且采用模2加法。 [0010] wherein, ⑶ formula based on a generator polynomial P1 (X), (4) the formula based on a generator polynomial Pq (X), i (η) and q (n) is a binary ( "0, and '1), and using modulo 2 addition. 为了获得I和Q路周期为32768 = 215的PN短码序列,在每个周期内仅发生一次的14个连续的输出'0'输出后,对i(n)和q(n)中插入一个'0' ;因此PN短码序列有15个连续的'0'输出。 In order to obtain I and Q PN short code sequence period is 215 = 32768, occurs only once in 14 successive outputs '0' after the output, one inserted in each period of the i (n) and q (n) '0'; thus short code PN sequences of 15 consecutive '0' output.

[0011] I路Q路生成的32768个PN序列通过码片偏移分为512组,偏移量大小为64码片长度。 [0011] I Q path channel PN sequence generated by the 32768 chip offset 512 is divided into groups, the offset size of 64 chip length. 512组PN序列标示为PNO,PWL PN511,PN0称为PN偏置为0的PN偏置。 512 PN sequence group denoted PNO, PWL PN511, PN0 known as PN offset of the PN offset 0. 512组PN 序列通过32768个码片循环移位获得,PNO起始位置为15个连续'0,输出后的一个'1,;PN η起始位置为ΡΝ0+64*η。 512 PN sequence group by cyclically shifting 32,768 yards sheet obtained, PNO starting position 15 consecutive '0, outputting a' 1,; PN η starting position ΡΝ0 + 64 * η.

[0012] 在前向链路中,PN偏置的值保存在同步信道,通过发送同步信道告知接收端。 [0012] In the forward link, PN offset values ​​stored in the synchronization channel, transmits a synchronization channel by informing the receiving end. 接收端一般通过解调同步信道可以获得PN偏置,但是解调同步信道存在计算量大,运算复杂的问题。 Usually the receiving end can be obtained by demodulating the sync channel PN offset, but the presence of large computation sync channel demodulation, the computational complexity of the problem.

发明内容 SUMMARY

[0013] 本发明的目的正是要克服上述技术的不足,而提供一种计算量低,运算简单的CDMA系统PN偏置获取装置及方法。 [0013] The object of the present invention is to overcome the deficiencies of the techniques described above, and to provide a low calculation amount, simple operation system of a CDMA PN offset acquisition apparatus and method.

[0014] 本发明解决其技术问题采用的技术方案:这种CDMA系统PN偏置获取方法,设置接收端通过匹配滤波器获取的PN序列偏移量PIL0T_MEASURE,该参数由PN偏置和PN短码在空间传输时间及硬件处理的时间而造成的码片偏移量组成,获取导频偏置增量PIL0T_INC ; 基站PN偏置通过下式计算获得:[0015] [0014] solve the technical problems of the technical solution of the present invention: This method of obtaining offset PN CDMA system, the receiving end disposed offset PN sequence matched filter PIL0T_MEASURE acquired, and the parameters from the offset PN short code PN chip space time and transmission time hardware processing of the composition caused by offset, acquisition pilot offset increment PIL0T_INC; base station PN offset obtained by the following formula: [0015]

Figure CN102170297AD00041

[0016] 其中U为取整操作,PIL0T_INC为CDMA系统导频偏置增量,是CDMA系统已知值, 从系统中获得。 [0016] wherein U is a rounding operation, PIL0T_INC a CDMA system the pilot offset increment, the CDMA system is a known value obtained from the system.

[0017] 所述PN获取模块获取PN偏置步骤如下: [0017] The acquisition module acquires the PN offset PN steps:

[0018] a、从基带处理模块中获取的一载波序列前N个序列χ (η)并移入匹配滤波器的数据输入端,N为匹配滤波器抽头个数; [0018] a, a front carrier sequence obtained from the N baseband processing module sequence χ (η) and into the data input matched filter, N is the number of matched filter taps;

[0019] b、PN存储模块中本地PN序列中的前N个序列移入匹配滤波器,同时,本地序列循环左移一位; [0019] b, PN storage module before the local PN sequence into a sequence of N matched filters, while a left cyclic local sequence;

[0020] C、通过匹配滤波器做卷积运算,即相当于进行相关运算,并保存运算结果和本地序列的移位次数; [0020] C, made by the matched filter convolution operation, which is equivalent to the correlation operation, and stores the number of shift operations and the results of the local sequence;

[0021] d、如果c步骤的运算结果值等于N或者本地序列完成一周期循环,则进行第e步骤操作,否则,进行c步骤操作; [0021] d, if the calculation result is equal to N in step c or the completion of a cycle of the local sequence cycle, step e is performed, otherwise, perform steps c;

[0022] e、如果c步骤运算结果值等于N,获取移位次数,进行g步骤操作;如果本地序列完成一周期循环,则进行f步骤操作; [0022] e, if the calculation result of step c value equal to N, the number of acquired displacement, perform steps g; if a local sequence cycles completed, the operation proceeds step f;

[0023] f、比较c步骤的N此运算结果,取最大值,并获取最大值时移位次数,进行g步骤操作; [0023] f, N c this operation result of the comparison step, taking the maximum, and acquires the maximum shift number of times, the steps performed g;

[0024] g、获取移位次数,得到PN偏移值; [0024] g, obtain the shift count, to give PN offset value;

[0025] h、通过PN获取模块得到接收信号的PN偏移量,通过(5)公式计算接收信号的PN 偏置,式中PIL0T_MEASURE为g步骤中得到的PN偏移量。 [0025] h, obtained by the obtaining module PN PN offset of the received signal, the received signal is calculated by (5) the formula PN offset, wherein PIL0T_MEASURE PN offset is obtained in step g.

[0026] 本发明所述的这种CDMA系统PN偏置获取装置,包括天线模块、下混频模块、A/D模块、DDC模块、基带处理模块和PN获取模块,天线模块、下混频模块、A/D模块、DDC模块、基带处理模块和PN获取模块依次串接在一起,PN获取模块包括PN序列存储模块、匹配滤波器模块和信号处理模块,基带处理模块的输出端与匹配滤波器模块的输入端相连接,匹配滤波器模块的输出端与信号处理模块的输入端相连接,PN序列存储模块与匹配滤波器模块相连接。 [0026] Such a CDMA system PN offset acquisition apparatus according to the present invention, includes an antenna module, the mixing module, A / D module, the DDC module, baseband processing module and PN acquisition module, the antenna module, the mixing module , a / D module, the DDC module, baseband processing module and PN acquisition module sequentially connected together, a PN sequence PN acquisition module comprises a storage module, a matched filter module and a signal processing module, baseband processing module and the output of the matched filter input terminal connected to the input module, the output of the matched filter module is connected to the signal processing module, the PN sequence storage module is connected to the matched filter module.

[0027] 所述的天线模块用于基站侧接收信号;下混频模块,用于将从天线接收的射频信号变为中频信号;A/D模块,用于从下混频模块中接收中频模拟信号,并将接收到的模拟信号转变成数字中频信号;DDC模块,用于将各个载波信号转变成零中频数字信号;基带处理模块,用于从DDC模块中的零中频数字信号提取一载波序列,并通过接收滤波器对该载波序列进行处理。 [0027] The antenna means for receiving a base station side signal; downmix module, a radio frequency signal received from an antenna to an intermediate frequency signal becomes; A / D module for receiving from a lower frequency analog mixing module signal, and converts the received analog signal into a digital intermediate frequency signal; DDC means for converting the respective carrier signal to zero IF digital signal; a baseband processing module, configured to extract a sequence of zero IF digital carrier signal from module DDC and processing the filter by receiving the carrier sequence.

[0028] 本发明有益的效果是:通过天线模块接收基站发射的信号,依次经过下混频模块、 A/D模块、DDC模块、基带处理模块处理,通过基带处理模块处理的序列经过PN偏置获取模块中指定的算法,完成PN偏置获取,根据获取的PN偏置生成相应的PN序列。 [0028] Advantageous effects of the present invention is: a base station receiving signals transmitted by the antenna module, sequentially passes through the mixing module, A / D module, the DDC module, baseband processing module, the processing by the baseband processing module via the serial PN offset obtaining the algorithm specified in the module, obtaining complete PN offset, to form the corresponding PN sequence according to the acquired PN offset. 本发明有益的效果:较传统的解同步信道方法获取PN偏置,该方法简单,易于实现。 Advantageous effects of the present invention: acquiring PN offset than conventional solutions a synchronization channel, the method is simple, easy to implement.

附图说明 BRIEF DESCRIPTION

[0029] 附图IPN偏置获取总体框图。 [0029] BRIEF IPN offset obtaining an overall block diagram. [0030] 附图2PN获取模块内部模块图。 [0030] BRIEF 2PN acquisition module internal block diagram.

[0031] 附图3匹配滤波器框图。 [0031] 3 matched filter block diagrams.

具体实施方式 Detailed ways

[0032] 为了使本发明的目的、技术方案及优点更加清楚明白,下面结合附图及举例,对本发明进行进一步详细说明。 [0032] To make the objectives, technical solutions and advantages of the present invention will become more apparent from, the accompanying drawings and the following example, the present invention will be further described in detail. 应当理解,此处所描述的举例仅仅用以解释本发明,并不用于限定本发明。 It should be understood that the example described herein are only intended to illustrate the present invention and are not intended to limit the present invention.

[0033] 本发明所述的这种CDMA系统PN偏置获取方法,设置接收端通过匹配滤波器获取的PN序列偏移量PIL0T_MEASURE,该参数由PN偏置和PN短码在空间传输时间及硬件处理的时间而造成的码片偏移量组成,获取导频偏置增量PIL0T_INC ;基站PN偏置通过下式计 [0033] Such a CDMA system PN offset acquisition method according to the present invention, the receiving end disposed PN sequence offsets PIL0T_MEASURE matched filter acquired by the parameter PN offset PN short code space and transmission time and hardware chip offset processing time caused by the composition, acquisition pilot offset increment PIL0T_INC; base station PN offset by the formula meter

算获得: Operators obtain:

[0034] [0034]

Figure CN102170297AD00051

[0035] 其中U为取整操作,PIL0T_INC为CDMA系统导频偏置增量,是CDMA系统已知值, 从系统中获得。 [0035] wherein U is a rounding operation, PIL0T_INC a CDMA system the pilot offset increment, the CDMA system is a known value obtained from the system.

[0036] 假设通过接收端匹配滤波器获得的PILOT MEASURE的值为200,PILOT INC为4。 [0036] By assuming the receiving terminal matched filter value obtained PILOT MEASURE 200, PILOT INC 4.

则, then,

[0037] [0037]

Figure CN102170297AD00052

[0039] 可以得到接收端接收到的信号来自PN偏置为4的基站。 [0039] can be obtained from the signal received by the receiver 4 of the base station PN offsets.

[0040] 所述PN获取模块获取PN偏置步骤如下: [0040] The acquisition module acquires the PN offset PN steps:

[0041] a、从基带处理模块中获取的一载波序列前N个序列χ (η)并移入匹配滤波器的数据输入端,N为匹配滤波器抽头个数,取N为64 ; [0041] a, a front carrier sequence obtained from the N baseband processing module sequence χ (η) and into the data input terminal of the matched filter, matched to the number of N-tap filter, taken as 64 N;

[0042] b、PN存储模块中本地PN序列中的前N个序列c (η)移入匹配滤波器的系数端,同时,存储在RAM内存中的本地序列数据进行更新一次,将原来的数据序列[c(0), c(l),……c (32767)]进行循环左移64位,即移位后的新序列变为[c (64), c (65), .....c(32767),c(0),c(l),c(63)],这样序列的数据排列顺序发生了改变,相当于本地PN序列的顺序为64 (即PN = 1); [0042] b, PN storage module before the sequence of N c (η) local PN sequence into coefficients of a matched filter end, while the sequence data stored in the local RAM memory is updated, the original data sequence [c (0), c (l), ...... c (32767)] 64-bit left cyclic, i.e., new shifted sequence becomes [c (64), c (65), ..... c (32767), c (0), c (l), c (63)], data of such a sequence the order changed, the order of the local PN sequence is the equivalent of 64 (i.e., PN = 1);

[0043] C、通过匹配滤波器做卷积运算,即相当于进行相关运算,并保存运算结果和本地序列的移位次数; [0043] C, made by the matched filter convolution operation, which is equivalent to the correlation operation, and stores the number of shift operations and the results of the local sequence;

[0044] d、如果c步骤的运算结果值等于N或者本地序列完成一周期循环,则进行第e步骤操作,否则,进行c步骤操作; [0044] d, if the calculation result is equal to N in step c or the completion of a cycle of the local sequence cycle, step e is performed, otherwise, perform steps c;

[0045] e、如果c步骤运算结果值等于N,获取移位次数,进行g步骤操作;如果本地序列完成一周期循环,则进行f步骤操作;[0046] f、比较c步骤的N此运算结果,取最大值,并获取最大值时移位次数,进行g步骤操作; [0045] e, if the calculation result of step c value equal to N, the number of acquired displacement, perform steps g; complete if a local sequence cycles, then perform steps f; [0046] f, N c this operation comparison step As a result, maximum value, and acquires the maximum shift number of times, the steps performed g;

[0047] g、获取移位次数,得到PN偏移值; [0047] g, obtain the shift count, to give PN offset value;

[0048] h、通过PN获取模块得到接收信号的PN偏移量,通过(5)公式计算接收信号的PN 偏置,式中PIL0T_MEASURE为g步骤中得到的PN偏移量。 [0048] h, obtained by the obtaining module PN PN offset of the received signal, the received signal is calculated by (5) the formula PN offset, wherein PIL0T_MEASURE PN offset is obtained in step g.

[0049] 本发明所述的这种CDMA系统PN偏置获取装置,包括天线模块、下混频模块、A/D模块、DDC模块、基带处理模块和PN获取模块,天线模块、下混频模块、A/D模块、DDC模块、基带处理模块和PN获取模块依次串接在一起,PN获取模块包括PN序列存储模块、匹配滤波器模块和信号处理模块,基带处理模块的输出端与匹配滤波器模块的输入端相连接,匹配滤波器模块的输出端与信号处理模块的输入端相连接,PN序列存储模块与匹配滤波器模块相连接。 [0049] Such a CDMA system PN offset acquisition apparatus according to the present invention, includes an antenna module, the mixing module, A / D module, the DDC module, baseband processing module and PN acquisition module, the antenna module, the mixing module , a / D module, the DDC module, baseband processing module and PN acquisition module sequentially connected together, a PN sequence PN acquisition module comprises a storage module, a matched filter module and a signal processing module, baseband processing module and the output of the matched filter input terminal connected to the input module, the output of the matched filter module is connected to the signal processing module, the PN sequence storage module is connected to the matched filter module.

[0050] 所述的天线模块用于基站侧接收信号;下混频模块,用于将从天线接收的射频信号变为中频信号,将射频信号混频为96M中频模拟信号,为后续操作提供信号源;A/D模块, 采用122. 88M采样率,从混频模块中接收中频模拟信号,并将接收到的模拟信号转变成数字中频信号,为后期数字信号处理提供数字信号;DDC模块,从A/D模块接收到的数字中频信号可能由各个载波组成,DDC模块,DDC模块将各个载波信号转变成零中频数字信号;基带处理模块,用于从DDC模块中的零中频数字信号提取频点为观3的载波序列。 [0050] The antenna means for receiving a base station side signal; downmix module, a radio frequency signal received from an antenna to an intermediate frequency signal becomes, the radio frequency signal to mixer 96M frequency analog signals to provide a signal for the subsequent operation source; a / D module 122. 88M sampling rate employed, the received intermediate frequency analog signal from the mixing block, and converts the received analog signals into digital intermediate frequency signal to provide a digital signal for post digital signal processing; the DDC module, from a / D module to receive the digital IF signal may be provided by the respective carrier composition, DDC module, shift module DDC respective carrier signal to zero IF digital signal; a baseband processing module, a digital zero-IF signal is extracted from the frequency point module DDC 3 for the concept of carrier sequence. 并通过接收滤波器对接收信号进行处理。 And processing of the received signal through the reception filter.

[0051] 可以理解的是,对本领域技术人员来说,对本发明的技术方案及发明构思加以等同替换或改变都应属于本发明所附的权利要求的保护范围。 [0051] It will be appreciated that the skilled person, the technical concept of the invention and the invention is to be changed, or equivalent replacements shall fall within the scope of the appended claims.

Claims (4)

1. 一种CDMA系统PN偏置获取方法,其特征是:设置接收端通过匹配滤波器获取的PN 序列偏移量PIL0T_MEASURE,该参数由PN偏置和PN短码在空间传输时间及硬件处理的时间而造成的码片偏移量组成,获取导频偏置增量PIL0T_INC ;基站PN偏置通过下式计算获得:PN= PILOT_MEASURE^PILOT JNC 巧■霞64*PILOT INC —— — _其中U为取整操作,PIL0T_INC为CDMA系统导频偏置增量,是CDMA系统已知值,从系统中获得。 A CDMA system PN offset acquisition method, wherein: the receiving terminal is provided offset PN sequence matched filter PIL0T_MEASURE acquired by the parameter PN offset PN short code space and transmission time and processing hardware chip offset time caused by the composition, acquisition pilot offset increment PIL0T_INC; base station PN offset obtained by the following equation: PN = PILOT_MEASURE ^ pILOT JNC Xia Qiao ■ 64 * pILOT INC - - _ wherein U is rounding operation, PIL0T_INC a CDMA system the pilot offset increment, the CDMA system is a known value obtained from the system.
2.根据权利要求1所述的CDMA系统PN偏置获取方法,其特征是:所述PN获取模块获取PN偏置步骤如下:a、从基带处理模块中获取的一载波序列前N个序列x(n)并移入匹配滤波器的数据输入端,N为匹配滤波器抽头个数;b、PN存储模块中本地PN序列中的前N个序列移入匹配滤波器,同时,本地序列循环左移一位;C、通过匹配滤波器做卷积运算,即相当于进行相关运算,并保存运算结果和本地序列的移位次数;d、如果c步骤的运算结果值等于N或者本地序列完成一周期循环,则进行第e步骤操作,否则,进行c步骤操作;e、如果c步骤运算结果值等于N,获取移位次数,进行g步骤操作;如果本地序列完成一周期循环,则进行f步骤操作;f、比较c步骤的N此运算结果,取最大值,并获取最大值时移位次数,进行g步骤操作;g、获取移位次数,得到PN偏移值;h、通过PN获取模 2. CDMA system according to claim. 1 PN offset acquisition method, wherein: said PN PN offset obtaining module obtains the following steps: a, prior to a carrier sequence obtained from the N baseband processing module sequence x (n) and into the data input terminal of the matched filter, matched to the number of N-tap filter; B, a local storage module PN sequence PN sequence into the first N matched filters, while a left cyclic local sequence position; C, made by convolution matched filter, which is equivalent to the correlation operation, and stores the number of shift operations and the results of the local sequence; D, if the operation result value is equal to N in step c or a complete sequence of local cycles , the operation for the first step e, otherwise, the steps c; e, if the calculation result of step c value equal to N, the number of acquired displacement, perform steps g; if a local sequence cycles completed, the operation proceeds step f; f, N c this operation result of the comparison step, taking the maximum, and acquires the maximum shift number of times, the steps performed g; g, obtaining the shift count, to give PN offset value; H, acquiring mode by PN 得到接收信号的PN偏移量,通过(5)公式计算接收信号的PN偏置, 式中PIL0T_MEASURE为g步骤中得到的PN偏移量。 Resulting PN offset of the received signal, the received signal is calculated by (5) the formula PN offset, wherein PIL0T_MEASURE PN offset is obtained in step g.
3. 一种CDMA系统PN偏置获取装置,其特征在于:包括天线模块、下混频模块、A/D模块、DDC模块、基带处理模块和PN获取模块,天线模块、下混频模块、A/D模块、DDC模块、基带处理模块和PN获取模块依次串接在一起,PN获取模块包括PN序列存储模块、匹配滤波器模块和信号处理模块,基带处理模块的输出端与匹配滤波器模块的输入端相连接,匹配滤波器模块的输出端与信号处理模块的输入端相连接,PN序列存储模块与匹配滤波器模块相连接。 A CDMA system PN offset obtaining means, wherein: the module includes an antenna, the mixing module, A / D module, the DDC module, baseband processing module and PN acquisition module, the antenna module, the mixing module, A / D module, the DDC module, baseband processing module and PN acquisition module sequentially connected together, a PN sequence PN acquisition module comprises a storage module, a matched filter module and a signal processing module, baseband processing module and the output of the matched filter module input terminal connected to the input, the output of the matched filter module is connected to the signal processing module, the PN sequence storage module is connected to the matched filter module.
4.根据权利要求3所述的CDMA系统PN偏置获取装置,其特征在于:所述的天线模块用于基站侧接收信号;下混频模块,用于将从天线接收的射频信号变为中频信号;A/D模块, 用于从下混频模块中接收中频模拟信号,并将接收到的模拟信号转变成数字中频信号;DDC 模块,用于将各个载波信号转变成零中频数字信号;基带处理模块,用于从DDC模块中的零中频数字信号提取一载波序列,并通过接收滤波器对该载波序列进行处理。 The CDMA system of claim 3, wherein the PN offset obtaining means, wherein: said antenna means for receiving a base station side signal; downmix module, a radio frequency signal received from an antenna to an intermediate frequency becomes signal; a / D module, the mixing module for receiving the intermediate frequency analog signal and converts the received analog signal into a digital intermediate frequency signal; the DDC means for converting the respective carrier signal to zero IF digital signal; baseband processing means for extracting a sequence of zero IF digital carrier signal DDC module from and processed by the receiving filter carrier sequence.
CN2011101028049A 2011-04-15 2011-04-15 PN (pseudo noise) offset obtaining device and method for CDMA (code division multiple access) system CN102170297A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011101028049A CN102170297A (en) 2011-04-15 2011-04-15 PN (pseudo noise) offset obtaining device and method for CDMA (code division multiple access) system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011101028049A CN102170297A (en) 2011-04-15 2011-04-15 PN (pseudo noise) offset obtaining device and method for CDMA (code division multiple access) system

Publications (1)

Publication Number Publication Date
CN102170297A true CN102170297A (en) 2011-08-31

Family

ID=44491292

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011101028049A CN102170297A (en) 2011-04-15 2011-04-15 PN (pseudo noise) offset obtaining device and method for CDMA (code division multiple access) system

Country Status (1)

Country Link
CN (1) CN102170297A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102857330A (en) * 2012-08-02 2013-01-02 奥维通信股份有限公司 Base station locking system and base station locking method for code division multiple access (CDMA) 2000 evolution data only (EVDO)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1302492A (en) * 1999-04-29 2001-07-04 三星电子株式会社 Apparatus and method for synchronizing channels in a W-CDMA communication system
CN101699773A (en) * 2009-11-10 2010-04-28 京信通信系统(中国)有限公司 Downstream synchronic PN code capturing method for CDMA 2000 1x EV-DO system
US20100202404A1 (en) * 2007-10-26 2010-08-12 Zte Corporation Method and system for implementing hard handovers between access networks
CN201976098U (en) * 2011-04-15 2011-09-14 三维通信股份有限公司 PN (pseudo noise) offset obtaining device of CDMA (code division multiple access) system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1302492A (en) * 1999-04-29 2001-07-04 三星电子株式会社 Apparatus and method for synchronizing channels in a W-CDMA communication system
US20100202404A1 (en) * 2007-10-26 2010-08-12 Zte Corporation Method and system for implementing hard handovers between access networks
CN101699773A (en) * 2009-11-10 2010-04-28 京信通信系统(中国)有限公司 Downstream synchronic PN code capturing method for CDMA 2000 1x EV-DO system
CN201976098U (en) * 2011-04-15 2011-09-14 三维通信股份有限公司 PN (pseudo noise) offset obtaining device of CDMA (code division multiple access) system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102857330A (en) * 2012-08-02 2013-01-02 奥维通信股份有限公司 Base station locking system and base station locking method for code division multiple access (CDMA) 2000 evolution data only (EVDO)
CN102857330B (en) * 2012-08-02 2015-03-25 奥维通信股份有限公司 Base station locking system and base station locking method for code division multiple access (CDMA) 2000 evolution data only (EVDO)

Similar Documents

Publication Publication Date Title
CN1065700C (en) Quadrature multiplexing of two data signals spread by different pnsquences
JP4769270B2 (en) Spread spectrum communication system and method utilizing chaotic sequences
US20020146080A1 (en) Pulse transmission transceiver architecture for low power communications
EP1618696A1 (en) Frequency synchronization apparatus and frequency synchronization method
JP3884776B2 (en) Cdma complex four-phase sequence generating method and generator for a communication system
CN100346591C (en) Initial cell search algorithm
US20140314126A1 (en) Method and apparatus for continuous phase modulation preamble encoding and decoding
Kilgus Pseudonoise code acquisition using majority logic decoding
JP4315658B2 (en) How to decode the incoming pulse signal of the ultra wideband type
KR20050008431A (en) Digital broadcasting transmission/reception capable of improving a receiving performance and a method signal processing thereof
US8948156B2 (en) Method and system for generating timed events in a radio frame in an E-UTRA/LTE UE receiver
EP1175019A1 (en) RAKE receiver for a CDMA system, in particular incorporated in a cellular mobile phone
CN100483963C (en) Orthogonal lower mixing frequency digital template matching pulse ultra wide band radio signal receiving method
CN1207848C (en) Method for generating signal for multi-emitting and multi-receiving transmitter antenna, and receiver
WO2002043279A1 (en) Apparatus and method for generating a preamble sequence in a wireless communication system
CN1117447C (en) Multiplex communicationg apparatus and method
EP2518961B1 (en) Method and device for detecting primary synchronization signal and generating sequence in long term evolution (lte) system
CN1983900A (en) Code division multiplex transmission manner, transmitter and receiver
US20120269232A1 (en) Chirp Communications
Yang et al. Phase-separated DCSK: A simple delay-component-free solution for chaotic communications
CN101035295A (en) Frame-synchronization generation method and its device in the ground digital TV system
CN1968029A (en) Spread-spectrum modulation and demodulation method by special spread spectrum sequence and device
CN102282790B (en) Apparatus and method for generating scrambling codes in a radio communication system
EP0366086A2 (en) Code shift keying (csk) apparatus and method for spectrum spread communication
US7961061B2 (en) Apparatus and method for modulation and demodulation using frequency selective baseband

Legal Events

Date Code Title Description
C06 Publication
C10 Entry into substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)