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40 results about "Gold code" patented technology
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A Gold code, also known as Gold sequence, is a type of binary sequence, used in telecommunication (CDMA) and satellite navigation (GPS). Gold codes are named after Robert Gold. Gold codes have bounded small cross-correlations within a set, which is useful when multiple devices are broadcasting in the same frequency range. A set of Gold code sequences consists of 2 + 1 sequences each one with a period of 2 − 1.
System and method for fast code phase and carrier frequency acquisition in GPS receiver
InactiveUS7027486B2Improve acquisitionShorten the timeBeacon systemsSatellite radio beaconingCarrier signalLong segment
A GPS receiver acquires carrier frequency and Gold code phase using short segments of a received GPS signal. In one embodiment, a 1-ms segment of the GPS signal is transformed to the frequency domain. This is multiplied by a frequency representation of the Gold code. The resulting product is converted to the time domain, and a peak is detected. The location of the peak corresponds to the code phase. If no peak is located, the carrier frequency is changed. Full- and half-bin steps in carrier frequency are considered. Processing gain is achieved by using longer segments of the input signal, for example 4 or 16 ms and integrating 1-ms segments. Considerations are provided for compensating for the effects of a transition, should it occur in the short segment of the GPS signal being processed. Integrations can be performed using non-coherent and coherent techniques. Adjustments are made for non-integral millisecond segment lengths.
Owner:SKYBITZ INC
Gold code generator design
InactiveUS20050273480A1Narrow downEasy to implement in parallelRandom number generatorsDigital function generatorsEngineeringLinear feedback shift register
A gold code generator is described comprising two pairs of linear feedback shift registers, the seed values for the second pair of linear feedback shift registers are different from the seed values for the first pair of linear feedback shift registers. The second seed values are calculated from the first seed values. The use of this second pair of linear feedback shift registers prevents the need to use a wide span of taps to the linear feedback shift register to produce output bits. By using two pairs of linear feedback shift registers, a parallel output implementation can be produced in which multiple output bits are produced in a single clock cycle.
Owner:INTEL CORP
PN code generator, GOLD code generator, PN code despreader, method for generating PN code, method for generating GOLD code, method for despreading PN code and computer program
InactiveUS20050190818A1Random number generatorsMultiplex code generationPhase shiftedLogical operations
Shift code patterns at four continuous phases obtained by dividing 15 shift code patterns given to the respective flip-flops of a linear feedback shift register of degree 4 into four parts are stored in a code memory (11). Besides, mask code patterns to shift a phase of a PN code (PN) to be generated by every four phases, are stored in a code mask memory (12). Next, a logical operation is performed at a phase shift circuit (13) by using the shift code pattern outputted from the code memory (11) and the mask code pattern outputted from the code mask memory (12), to generate a PN code (PN) having a code length of 15 from a random phase.
Owner:SOCIONEXT INC
3GPP WCDMA receiver using pipelined apparatus and method for performing cell searches
A pipelined cell search apparatus having a primary search stage, a secondary stage and a Gold code stage. The primary stage receives a primary synchronization channel (P-SCH) signal, detects a maximum peak of a slot boundary in the P-SCH signal, and generates slot timing data from the maximum peak. The secondary search stage receives a secondary synchronization channel (S-SCH) signal and the slot timing data, and detects in the S-SCH signal a maximum peak of a frame boundary. The secondary search stage generates frame timing data and a group ID of a base station transmitting the P-SCH signal and the S-SCH signal. The Gold code search stage receives a common control pilot channel (CPICH) signal, the slot timing data, the frame timing data, and the group ID and detects in the CPICH signal a maximum peak associated with a Gold code of the base station.
Owner:NAT SEMICON CORP
System and method for fast code phase and carrier frequency acquisition in GPS receiver
InactiveUS7010066B2Improving acquisition phaseShorten the timeAmplitude-modulated carrier systemsBeacon systemsTime domainCarrier signal
A GPS receiver acquires carrier frequency and Gold code phase using short segments of a received GPS signal. In one embodiment, a 1-ms segment of the GPS signal is transformed to the frequency domain. This is multiplied by a frequency representation of the Gold code. The resulting product is converted to the time domain, and a peak is detected. The location of the peak corresponds to the code phase. If no peak is located, the carrier frequency is changed. Full- and half-bin steps in carrier frequency are considered. Processing gain is achieved by using longer segments of the input signal, for example 4 or 16 ms and integrating 1-ms segments. Considerations are provided for compensating for the effects of a transition, should it occur in the short segment of the GPS signal being processed. Integrations can be performed using non-coherent and coherent techniques.
Owner:SKYBITZ INC
PN code generator, GOLD code generator, PN code despreader, method for generating PN code, method for generating GOLD code, method for despreading PN code and computer program
Shift code patterns at four continuous phases obtained by dividing 15 shift code patterns given to the respective flip-flops of a linear feedback shift register of degree 4 into four parts are stored in a code memory (11). Besides, mask code patterns to shift a phase of a PN code (PN) to be generated by every four phases, are stored in a code mask memory (12). Next, a logical operation is performed at a phase shift circuit (13) by using the shift code pattern outputted from the code memory (11) and the mask code pattern outputted from the code mask memory (12), to generate a PN code (PN) having a code length of 15 from a random phase.
Owner:SOCIONEXT INC
Implementation method for preventing forwarding interference of frequency modulation radio fuze
InactiveCN103095334AFlexible change of fuze action distanceIncrease lethalityTransmission18-bitInterference resistance
The invention provides an implementation method for preventing forwarding interference of a frequency modulation radio fuze and aims to provide a digitalized interference prevention fuze implementation method with which triangular wave frequency can be flexibly adjusted, fuze operating distance can be changed, and forwarding interference prevention capacity of fuze equipment can be improved. The implementation method is realized by the following technical scheme. A triangular wave generator formed by a triangular wave frequency control word, an N-bit phase accumulator, a data bit cut processor and a triangular wave phase lookup table in sequence and a BPSK (Binary Phase Shift Keying) modulator crosslinked between a balance GOLD code generator and a digital-to-analog converter are designed in a programmable gate array chip FPGA (Field Programmable Gata Array). After the triangular wave generator frequency is given, the computational formula of the triangular wave frequency control word is adopted in the DDS triangular wave generator. The calculated triangular wave frequency control word is sent to the N-bit phase accumulator to be accumulated, the lower 18 bits of the data are cut and the higher 14 bits of the data are maintained. The data is sent to the triangular wave lookup table, and phase-to-range conversion of triangular wave signals is achieved.
Owner:10TH RES INST OF CETC
Base band adaptive digital predistortion power amplifier correcting method and system
InactiveCN101483623AAchieve correctionEasy to handleSynchronous/start-stop systemsEngineeringSelf adaptive
The invention suitable for a field of linearization processing of transmitting terminals of digital televisions provides a baseband adapting digital pre-distortion power amplifier correcting method and a system thereof. The method comprises that, in a communication state, a residual difference between a communication signal after being pre-distorted and a signal re-introduced from a power amplifier, reduced by G times and pre-distorted, wherein the G is the power amplifier gain, is calculated in real time, when the value of the residual difference is bigger than the value of a preset threshold 1, the communication state is cut off, and the system enters a training state; in the training state, a residual difference between a signal obtained by pre-distorting a training sequence and eliminating the synchronous head and a signal re-introduced from a power amplifier, reduced by G times, pre-distorted, with the synchronous head eliminated is calculated in real time, the two coefficients used in pre-distortion processing are iterated and upgraded by an LS method and a Newton method until the value of the residual difference is converged, and when the residual difference is lower than the value of a preset threshold 2, the training state is ended and the communication state is recovered, wherein, the training sequence is gold codes having a synchronous head.
Owner:CHENGDU KAITENG SIFANG DIGITAL RADIO & TELEVISION EQUIP CO LTD
Method and system for processing positioning signals in a stand-alone mode
InactiveUS7057553B2Eliminates and reduces disadvantage and problemQuick checkPosition fixationBeacon systemsCarrier frequency offsetPeak value
A method for processing positioning signals in a ranging receiver in a stand-alone mode is provided. The method includes collecting pseudorange samples from positioning signals received at the ranging receiver from a plurality of satellites. The pseudorange samples comprise message data modulation. Each satellite has an associated Gold code. A previously determined carrier frequency offset (CFO) is selected from a plurality of directly extracted CFOs. The pseudorange samples are compensated for the selected CFO. The message data modulation is removed from the pseudorange samples. The pseudorange samples are stacked for each satellite. The Gold code associated with each satellite is correlated to generate a pseudorange time sequence for the satellite. A determination is made regarding whether an adequate correlation peak exists in each pseudorange time sequence. A pseudorange is determined for the ranging receiver based on the correlation peaks when an adequate correlation peak exists in each pseudorange time sequence.
Owner:FAST LOCATION NET
Method and system for processing positioning signals in a stand-alone mode
InactiveUS20050035904A1Eliminates and reduces disadvantage and problemQuick checkPosition fixationBeacon systemsCarrier frequency offsetPeak value
A method for processing positioning signals in a ranging receiver in a stand-alone mode is provided. The method includes collecting pseudorange samples from positioning signals received at the ranging receiver from a plurality of satellites. The pseudorange samples comprise message data modulation. Each satellite has an associated Gold code. A previously determined carrier frequency offset (CFO) is selected from a plurality of directly extracted CFOs. The pseudorange samples are compensated for the selected CFO. The message data modulation is removed from the pseudorange samples. The pseudorange samples are stacked for each satellite. The Gold code associated with each satellite is correlated to generate a pseudorange time sequence for the satellite. A determination is made regarding whether an adequate correlation peak exists in each pseudorange time sequence. A pseudorange is determined for the ranging receiver based on the correlation peaks when an adequate correlation peak exists in each pseudorange time sequence.
Owner:FAST LOCATION NET
Simultaneous plural code series generator and CDMA radio receiver using same
InactiveUS20020181558A1Reduce circuit sizeReduce power consumptionLogic circuits characterised by logic functionPolarisation/directional diversityRadio receiverEngineering
An EOR (XR11, XR12) of outputs from a plurality of shift stages S1, S2, S4 of an M-series generator 31A is formed, thereby obtaining an M-series which has a desired delay, which in an example is a three bit delay with respect to the output code from the generator 31A. Similarly, outputs from a plurality of shift stages are combined and an EOR thereof is formed to provide another delayed M-series. An EOR of each output from the simultaneously delayed code generator 31 and an output from other M-series generator 32 is formed, thus simultaneously obtaining a plurality of Gold code series.
Owner:KOKUSA ELECTRIC CO LTD
Generation method as well as positioning method and device of time-division code-division orthogonal frequency division multiplexed signals
ActiveCN102724156AImproved cross-correlation suppression propertiesIncrease the score resultMulti-frequency code systemsData streamForward error correction
The invention discloses a generation method as well as a positioning method and device of time-division code-division orthogonal frequency division multiplexed signals, and belongs to the field of communication. The method comprises the following steps: receiving a data stream, performing forward error correction coding and OFDM (orthogonal frequency division multiplexing) modulation on the data stream, generating OFDM signals, and generating first spreading codes; getting second spreading codes with the code length which is not less than 511 bits, and superimposing the OFDM signals with a plurality of the second spreading codes to get superimposed OFDM spreading codes; and generating TC (time division and code division)-OFDM signals according to the first spreading codes and the superimposed OFDM spreading codes. According to the method disclosed by the invention, the GOLD codes with the code length which is not less than 511 bits are utilized for correlation integration of a 25ms time slot, the correlation integration result is increased, the cross correlation suppression property of broadcast positioning signals is improved and the positioning precision is improved. Furthermore, through frequency division operation, the property of suppressing cross correlation interference of the generated positioning signals is jointly decided by two factors, the suppression of the cross correlation interference can be well improved.
Owner:BEIJING UNIV OF POSTS & TELECOMM +1
3GPP WCDMA receiver using pipelined apparatus and method for performing cell searches
Owner:NAT SEMICON CORP
Synchronizing method for quadrature frequency division multiple access system
InactiveCN1852281AImprove spectrum utilizationReduce complexityMulti-frequency code systemsSignal channelsTime domainInverse discrete fourier transform
The method includes steps: in orthogonal frequency division multiple access (OFDMA) system, when number of usable sub carrier wave is equal to length of inverse discrete Fourier transform (IDFT), Gold code is adapted as synch sequence directly; when the said number is not equal to the said length, Gold code equal to half length of IDFT is inserted to symmetrical frequency points with, and zeros are inserted to zero frequency points and other frequency points without inserting Gold codes; after being converted to time domain, the sequence is in use as synch sequence; sending the synch sequence to receiving end from the sending end to establish synch; sending superposed data in OFDMA and synch sequence to the receiving end, or sending data in OFDMA to receiving end directly; using dichotomy at receiving end , the receiving end searches relevant peak value of synch sequence, using estimated carrier deviation compensates phase of received signal so as to obtain data of OFDMA system.
Owner:BEIJING UNIV OF POSTS & TELECOMM +1
System and method for fast code phase and carrier frequency acquisition in GPS receiver
A GPS receiver acquires carrier frequency and Gold code phase using short segments of a received GPS signal. In one embodiment, a 1-ms segment of the GPS signal is transformed to the frequency domain. This is multiplied by a frequency representation of the Gold code. The resulting product is converted to the time domain, and a peak is detected. The location of the peak corresponds to the code phase. If no peak is located, the carrier frequency is changed. Full- and half-bin steps in carrier frequency are considered. Processing gain is achieved by using longer segments of the input signal, for example 4 or 16 ms and integrating 1-ms segments. Considerations are provided for compensating for the effects of a transition, should it occur in the short segment of the GPS signal being processed. Integrations can be performed using non-coherent and coherent techniques. Adjustments are made for non-integral millisecond segment lengths.
Owner:思凯比特兹公司
System and Method for Fast Code Phase and Carrier Frequency Acquisition in GPS Receiver
InactiveUS20130257653A1Improve acquisitionShorten the timeBeacon systemsSatellite radio beaconingTime domainGps receiver
A GPS receiver acquires carrier frequency and Gold code phase using short segments of a received GPS signal. In one embodiment, a 1-ms segment of the GPS signal is transformed to the frequency domain. This is multiplied by a frequency representation of the Gold code. The resulting product is converted to the time domain, and a peak is detected. The location of the peak corresponds to the code phase. If no peak is located, the carrier frequency is changed. Full- and half-bin steps in carrier frequency are considered. Processing gain is achieved by using longer segments of the input signal, for example 4 or 16 ms and integrating 1-ms segments. Considerations are provided for compensating for the effects of a transition, should it occur in the short segment of the GPS signal being processed. Integrations can be performed using non-coherent and coherent techniques. Adjustments are made for non-integral millisecond segment lengths.
Owner:SKYBITZ INC
Method for detecting precode sequence and precode detector
InactiveCN1196272CMultiplex code generationRadio transmission for post communicationComputer scienceGold code
The invention relates to a method of detecting a precode sequence of a group of precode sequence in a spread frequency signal, including following steps: (a) correlating the received spread frequency signal with the aggregate sequence of a first orthogona gold code (OGC) to provide precode signal; (b) according to the second quick switching method, correlating the precode signal with the precode sequences to generate a group index value; (c) according to this group index value, forming decisive statistic; (d) selecting the precode sequence corresponding to the decisive statistic as detecting precode sequence of the precode sequence in this group.
Owner:LUCENT TECH INC
Positioning satellite signal capturing system with high sensitivity
InactiveCN103033826AIncrease profitIncrease or decrease the numberSatellite radio beaconingDigital down conversionDigital controlled oscillator
The invention discloses a positioning satellite signal capturing system with high sensitivity. The positioning satellite signal capturing system with the high sensitivity comprises a first digital-controlled oscillator, a half-band filter, a withdrawal device, a memorizer and a correlator, wherein the first digital-controlled oscillator is used for digital downconversion of input signals to enable in-phase orthogonal signals to be generated, the half-band filter is used for filtering high-frequency noise of the in-phase orthogonal signals, the withdrawal device is used for withdrawing filtered signals to reduce the rate of the signals, the memorizer is used for memorizing withdrawn signals, and the correlator is used for extracting signals from the memorizer for related searches. Due to the fact that the correlator is adopted for the related searches, flexible configuration of resources and searching speed is achieved in a searching process, and further the utilization rate of the resources is improved. Different capturing systems can be used only by replacing a gold code generating device and adjusting calculating speed, and therefore compatibility and transportability are good. Furthermore, balance between the resources and the searching speed can be achieved by increasing or decreasing the number of sub-correlators appropriately. The positioning satellite signal capturing system with the high sensitivity is widely used in the satellite communication field.
Owner:ALLWIN TELECOMM
Method of blind estimation of a scrambling code of a WCDMA uplink
InactiveUS8873605B2Data representation error detection/correctionCode conversionShift registerBelief propagation
Owner:COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Gold code generator design
InactiveUS7080107B2Easy to implementRandom number generatorsDigital function generatorsEngineeringLinear feedback shift register
Owner:INTEL CORP
Method and apparatus for efficient gold code generation and management in WCDMA systems
ActiveUS20070237116A1Generate efficientlyEfficient managementRadio transmissionFir systemTime shifting
A method and an apparatus for efficient Gold code generation and management in WCDMA systems are presented. Aspects of the method may include simultaneously generating, based on the codeword sequence, a plurality of scrambling code segments associated with a scrambling code. A plurality of scrambling code segments, where each is associated with a corresponding one of a plurality of scrambling codes, may also be simultaneously generated. The plurality of scrambling codes may form a scrambling code group. Based on the codeword sequence, a plurality of time shifted versions of at least one scrambling code segment associated with a scrambling code may also be simultaneously generated.
Owner:AVAGO TECH INT SALES PTE LTD
Transmission and decoding method based on gold code applied to MIMO downlink system
InactiveCN108183737AReduced decoding complexityLow decoding complexitySpatial transmit diversityTransmitter/receiver shaping networksPrecodingRound complexity
The invention discloses a transmission and decoding method based on a gold code applied to an MIMO downlink system. The method comprises the following steps of 1, designing a pre-coding codebook; 2, selecting a pre-coding codebook; 3, sending a signal by a base station through using pre-coding; 4, receiving a signal matrix Y by a user side; and 5, decoding the signal matrix Y. The method providedby the invention has the beneficial effect as follows: the gold code generally adopts an ML decoding method, and the decoding complexity is relatively high. When r is equal to 1, the scheme provided by the invention has linear decoding complexity and can achieve a full rate, that is to say a signal symbol is sent at a time. When r is equal to 2, the decoding complexity of the joint decoding methodprovided by the invention can be adjusted via a threshold value A, the partial linear decoding can be achieved, and thus the decoding complexity is reduced, and the joint decoding method can achievethe performance similar to that of the ML decoding method. And meanwhile, the transmission scheme provided by the invention is low in decoding complexity and meanwhile also improved in system performance.
Owner:HANGZHOU DIANZI UNIV
Method for acquiring a gold sequence by double iterative decoding
ActiveUS20160061961A1Active radio relay systemsSatellite radio beaconingMinimum weightComputer science
A method for acquiring a Gold code, obtained as a sum of a first M-sequence (x) and a second M-sequence (yi), the first M-sequence being generated by a first generator polynomial (gx) and the second M-sequence being generated by a second generator polynomial (gy), the weight of the first generator polynomial being lower than the weight of the second generator polynomial, the acquiring method involving a first step of message passing decoding according to a first bipartite graph the edges of which are determined by the coefficients of the first generator polynomial, a decimation step using a predetermined decimation factor, and a second step of message passing decoding according to a second bipartite graph the edges of which are determined by a third generator polynomial having a minimum weight generating a third M-sequence having the same length as that of the second M-sequence.
Owner:COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Method for acquiring a gold sequence by double iterative decoding
A method for acquiring a Gold code, obtained as a sum of a first M-sequence (x) and a second M-sequence (yi), the first M-sequence being generated by a first generator polynomial (gx) and the second M-sequence being generated by a second generator polynomial (gy), the weight of the first generator polynomial being lower than the weight of the second generator polynomial, the acquiring method involving a first step of message passing decoding according to a first bipartite graph the edges of which are determined by the coefficients of the first generator polynomial, a decimation step using a predetermined decimation factor, and a second step of message passing decoding according to a second bipartite graph the edges of which are determined by a third generator polynomial having a minimum weight generating a third M-sequence having the same length as that of the second M-sequence.
Owner:COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Method of blind estimation of a scrambling code of a wcdma uplink
A method for estimating a scrambling code used on an uplink of a WCDMA system. The scrambling code is obtained from a Gold code, sum of a first specific M-sequence of the user and of a second M-sequence known from the receiver. After sampling of the signal received at the chip frequency of the scrambling code the successive samples are subject to a differential treatment and the sequence of differential values is multiplied by the second M-sequence. The observables thereby obtained are decoded with the aid of a belief propagation iterative decoding. The decoded values then serve to determine the content of the shift register of the generator of the first M-sequence. One then deduces therefrom the Gold code and an estimation of the scrambling code, Ĉ.
Owner:COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Synchronizing method for quadrature frequency division multiple access system
InactiveCN1852281BImprove spectrum utilizationReduce complexityMulti-frequency code systemsSignal channelsTime domainInverse discrete fourier transform
The method includes steps: in orthogonal frequency division multiple access (OFDMA) system, when number of usable sub carrier wave is equal to length of inverse discrete Fourier transform (IDFT), Goldcode is adapted as synch sequence directly; when the said number is not equal to the said length, Gold code equal to half length of IDFT is inserted to symmetrical frequency points with, and zeros are inserted to zero frequency points and other frequency points without inserting Gold codes; after being converted to time domain, the sequence is in use as synch sequence; sending the synch sequenceto receiving end from the sending end to establish synch; sending superposed data in OFDMA and synch sequence to the receiving end, or sending data in OFDMA to receiving end directly; using dichotomyat receiving end , the receiving end searches relevant peak value of synch sequence, using estimated carrier deviation compensates phase of received signal so as to obtain data of OFDMA system.
Owner:BEIJING UNIV OF POSTS & TELECOMM +1
GPS suppressive interference mode
PendingCN108562915AImprove interference effectSatellite radio beaconingBpsk modulationGps navigation
The invention discloses a GPS suppressive interference mode. The GPS suppressive interference mode is characterized in that the transmission rate of a GPS navigation message is 50b / s, and the code element of a pseudo-random sequence for spreading spectrum has a 1.023 Mb / s C / A code rate; 1 bit of GPS navigation message data code is extended to 20,460 bits; as the length of the C / A code is 1023, thecode element of one C / A code is repeated for 20 times in a chip of 20460 spread spectrum sequence codes; one C / A code is taken, and then a random sequence is generated; each bit of the random sequence is repeated for 1023 times, and the C / A code is multiplied by the random sequence to implement the spreading process; and after BPSK modulation, the front end of a receiver may encounter Gaussian white noise and human interference, and through a switch, GOLD code broadband interference is selected to be introduced. The GPS suppressive interference mode has the advantage that the broadband GOLD code interference signal has preferable interference effect.
Owner:YANGZHOU POLYTECHNIC COLLEGE
Chinese-character 'Pure gold code' input method
InactiveCN1182458CInstant inputFastInput/output processes for data processingChinese charactersAlgorithm
A Chinese-character "Pure gold code" input method features that the encoding parts of Chinese characters are assigned to 27 keys, that is, 26 letter keys plus "["or"]" key and a "Pure gold code" encode rule is used for inputting single words or phrases. Its advantages are easily mastering it and high input speed.
Owner:郭纯生
Generation method as well as positioning method and device of time-division code-division orthogonal frequency division multiplexed signals
ActiveCN102724156BImproved cross-correlation suppression propertiesIncrease the score resultMulti-frequency code systemsData streamForward error correction
Owner:BEIJING UNIV OF POSTS & TELECOMM +1
Star topological frame structure
ActiveCN107846244AEasy to set upThe networking process is simple and fastStar/tree networksRadio transmission for post communicationWave shapeBpsk modulation
The invention provides a star topological frame structure, aims at providing a star topological frame structure having certain antijamming capability and being suitable for distributed aircraft networking, a networking process of the star topological frame structure is simple and rapid and the number of the networking nodes for the star topological frame structure is flexible. The star topologicalframe structure is implemented through the following technical scheme: in a network of the star topological frame structure, a transmission timeline between a central node A and noncentral nodes B, C, D and E is divided into a plurality of radio frames RF, each radio frame RF comprises a plurality of resource units RU, the first resource unit RU bears a central node sending waveform, the other resource units RU bear a noncentral node sending waveform; each RU comprises a control time slot composed of a synchronous head, a guiding sequence and a control data area, a service time slot composedof the guiding sequence and a service data area, and a protection interval; BPSK modulation, convolutional encoding and GOLD code spreading are used for the control data area in the control time slot;and QPSK modulation, convolutional encoding and GOLD code spreading are used for the service data area in the service time slot.
Owner:10TH RES INST OF CETC
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