CN101286815A - Channel encoding apparatus and method in wireless communication system - Google Patents
Channel encoding apparatus and method in wireless communication system Download PDFInfo
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- CN101286815A CN101286815A CNA2007101964396A CN200710196439A CN101286815A CN 101286815 A CN101286815 A CN 101286815A CN A2007101964396 A CNA2007101964396 A CN A2007101964396A CN 200710196439 A CN200710196439 A CN 200710196439A CN 101286815 A CN101286815 A CN 101286815A
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Abstract
The invention provides a channel coding device and a method in a wireless communication system. The channel coding device is comprised in a transmitter used for transmitting information bits, wherein, the transmitter comprises a cyclic redundancy check coding module used for receiving the information bits, generating cyclic redundancy check bits and adding cyclic redundancy check bits in the information bits to form input bits, a tail-biting convolutional encoder connected to the cyclic redundancy check coding module and used for generating output code elements according to the input bits by the tail-biting technique, and a modulation model used for modulating the output code elements. The application formula of the tail-biting convolutional encoder is R which is equals to k/n and the input bits with length of k are transformed into bit sequence with length of n, wherein, R is effective coding rate; k is equals to b plus c, wherein, b is the number of a plurality of bits generated by the tail-biting convolutional encoder to the input bits during coding and c is the number of the cyclic redundancy check bits generated by the tail-biting convolutional encoder.
Description
Technical field
The present invention relates to the signal transmission in the wireless communication system, in particular to the system and method for on radio control channel, information being encoded.
Background technology
Be appreciated that in a wireless communication system, can use specific Traffic Channel carrying out data communication between for example base station and the Wireless Telecom Equipment or between WAP (wireless access point) and the Wireless Telecom Equipment.Also be appreciated that in order to make Wireless Telecom Equipment receive and to decipher the information on the Traffic Channel exactly, need some information specific.For example insert in (CDMA, Code DivisionMultiple Access) system at code division multiple access, the message frame of different length can carry the voice-and-data business information.A Wireless Telecom Equipment can need the information frame of a plurality of length to determine all payload informations.
For example quick pilot quality indicating channel (F-PQICH, Fast Pilot Quality IndicatorChannel), forward direction is other sector interference channel (F-FOSICH fast, Forward-Fast OtherSector Interference Channel), other sector interference channel of forward direction (F-OSICH, Forward-Other Sector Interference Channel), forward direction heat noise channel (F-IOTCH, Forward-Interference Over Thermal Channel), reverse cdma Dedicated Control Channel (R-CDCCH, Reverse-CDMA Dedicated Control Channel), reverse shared control channel (R-SCCH, Reverse-Shared Control Channel) etc. control channel is used to transmit the information corresponding with it, and for example the pilot quality indicating channel carries the quantized value of the reverse-link pilot frequency intensity of each Active Terminal (active terminal) fast.Forward direction fast other sector interference channel carries other sector interface index signal, the signal rate height that transmits on than other sector interference channel of forward direction in other sector interface index signal of this channel but coverage rate is little.
In following description and claims, the term of use " Wireless Telecom Equipment " is referred to any apparatus that can carry out radio communication, for example base station or WAP (wireless access point).Therefore, this term " Wireless Telecom Equipment " includes but not limited to the communication equipment of cellular-telephone type, these communication equipments are also referred to as hand-held set, mobile phone, mobile communication equipment etc., perhaps be called personal digital assistant (PDA with communication capacity, Personal Digital Assistants), smart mobile phone, comprise that Hand Personal Computer, kneetop computer and desktop computer etc. have the computing equipment of communication capacity.
Yet, the many embodiment and the example that also are appreciated that here to be mentioned can be referred to wireless wide area network (WWAN, Wireless Wide Area Networks), method and system described here also can be applied to wireless personal-area network road (WPAN, Wireless Personal Area Network), WLAN (wireless local area network) (WLAN, Wireless Local Area Network), wireless MAN (WMAN, WirelessMetropolitan Area Network) etc.Be appreciated that also these networks comprise the access device or the device of some types, these access devices or device comprise for example base station in wireless wide area network or wireless MAN, perhaps the equipment such as access point in WLAN (wireless local area network) for example.Therefore be appreciated that also that the reference of these access devices and device can exchange, unless and shown the content of these references clearly in some place, other access device and device can not be foreclosed to the reference of a kind of access device and device wherein.
Summary of the invention
Below, for example the invention describes in a ultra broadband (UMB, Ultra Mobile Broadband) system, be used for the implementation method and the system of control channel transmission information.Be used to realize that the channel architecture of this control channel can transmit the more information bit effectively, and the method for using tail bit convolution coding (tail-biting convolutional code) and cyclic redundancy check (CRC) (CRC, CyclicalRedundancy Check) can realize more effectively that Lou sign indicating number detects (Missing detection) and false alarm function (false alarm).
One aspect of the present invention has been set forth a transmitter design embodiment who adopts above coding techniques.This transmitter design can be applied in the design of uplink transmitter and downlink transmitter as required.This transmitter comprises channel encoder, this channel encoder is used for this information bit is encoded and it is transmitted on control channel, this transmitter comprises the cyclic redundancy check (CRC) coding module, be used to receive this information bit, produce cyclic redundancy check bits, and in this information bit, increase this cyclic redundancy check bits formation input bit; Tail bit convolution encoder, be connected to this cyclic redundancy check (CRC) coding module, this tail bit convolution encoder is used for producing output symbol by tail bit technology according to this input bit, this tail bit convolution encoder uses formula R=k/n, with length is that this input bit of k is converted to the bit sequence that length is n, wherein R is the efficient coding speed of this tail bit convolution encoder, k=b+c, wherein b is a plurality of bit numbers that this tail bit convolution encoder is encoded and produced this input bit, and c is this cyclic redundancy check bits number that this tail bit convolution encoder produces; And modulation module, be used for this output symbol is modulated.
Another aspect of the present invention has been set forth control channel signals has been carried out the Methods for Coding example, and is as described herein, used different technology in these embodiments.This method is used at leading channel this information bit being encoded, and comprises receiving this information bit; Produce cyclic redundancy check bits, this cyclic redundancy check bits is used for this information bit is carried out cyclic redundancy check (CRC); This cyclic redundancy check bits that produces is increased to this information bit, produce input bit according to efficient coding speed R; Use tail bit technology to produce output symbol according to this input bit; Use formula R=k/n, with length is that this output symbol of k is converted to the bit sequence that length is n, k=b+c wherein, a plurality of bit numbers that b encodes and produces this output symbol for this tail bit convolution encoder, c are this cyclic redundancy check bits number that this tail bit convolution encoder produces; And this output symbol modulated.
Another aspect of the present invention has been set forth a kind of access point apparatus that is used for transmission information bit, comprises receiver, is used to receive coded signal; Transmitter, be used to produce this coded signal that transmits, this transmitter comprises channel encoder, this channel encoder is used for this information bit is encoded, this channel encoder also comprises: the cyclic redundancy check (CRC) coding module, be used to receive this information bit, produce cyclic redundancy check bits, and in this information bit, increase this cyclic redundancy check bits formation input bit; Tail bit convolution encoder, be connected to this cyclic redundancy check (CRC) coding module, this tail bit convolution encoder is used for producing output symbol by tail bit technology according to this input bit, this tail bit convolution encoder uses formula R=k/n, with length is that this input bit of k is converted to the bit sequence that length is n, wherein R is the efficient coding speed of this tail bit convolution encoder, k=b+c, wherein b is a plurality of bit numbers that this tail bit convolution encoder is encoded and produced this input bit, and c is this cyclic redundancy check bits number that this tail bit convolution encoder produces; And modulation module, be used for this output symbol is modulated.
A kind of mobile unit that is used for transmission information bit has been set forth in another aspect of the present invention, comprises receiver, is used to receive coded signal; Transmitter, be used to produce this coded signal that transmits, this transmitter comprises channel encoder, this channel encoder is used for this information bit is encoded, this channel encoder also comprises the cyclic redundancy check (CRC) coding module, be used to receive this information bit, produce cyclic redundancy check bits, and in this information bit, increase this cyclic redundancy check bits formation input bit; Tail bit convolution encoder, be connected to this cyclic redundancy check (CRC) coding module, this tail bit convolution encoder is used for producing output symbol by tail bit technology according to this input bit, this tail bit convolution encoder uses formula R=k/n, with length is that this input bit of k is converted to the bit sequence that length is n, wherein R is the efficient coding speed of this tail bit convolution encoder, k=b+c, wherein b is a plurality of bit numbers that this tail bit convolution encoder is encoded and produced this input bit, and c is this cyclic redundancy check bits number that this tail bit convolution encoder produces; And modulation module, be used for this output symbol is modulated.
In following " embodiment " will to various features of the present invention, aspect and embodiment be further described.
Description of drawings
Below in conjunction with accompanying drawing feature of the present invention, aspect and embodiment are described.
Fig. 1 is a schematic diagram, and it is according to an embodiment, has set forth the example that is used for control channel encoder that the information bit of control channel is encoded.
Fig. 2 is a schematic diagram, and it is according to an embodiment, has set forth another example that is used for control channel encoder that the information bit of control channel is encoded.
Fig. 3 is a schematic diagram, and it has been set forth a cyclic redundancy check bits that can be contained in the encoder shown in Figure 1 and produced examples of circuits according to an embodiment.
Fig. 4 is a schematic diagram, and it has been set forth another cyclic redundancy check bits that can be contained in the encoder shown in Figure 1 and produced examples of circuits according to an embodiment.
Fig. 5 is a flow chart, and it has set forth the method example that is used for the control channel digital coding according to an embodiment.
Fig. 6 is a flow chart, and it has set forth second example of method that is used for the control channel digital coding according to an embodiment.
Fig. 7 is a flow chart, and it has set forth the 3rd example of method that is used for the control channel digital coding according to an embodiment.
Embodiment
The embodiment of the following stated can be used for transmission preamble (preamble) information bit is carried out effective control channel information coding.This embodiment uses tail bit convolution coding and cyclic redundancy check (CRC), and be used in combination for example biphase phase shift keying (BPSK, binary phase-shift keying), quaternary PSK (QPSK, quadrature phase-shift keying), quadrature amplitude modulation modulator approaches such as (QAM, quadatureamplitude modulation).The modulation scheme that the following stated embodiment adopts quaternary PSK to describe as generality.Yet be appreciated that, adopt this modulation scheme only for simplicity, can't get rid of the use of other modulation scheme.
In addition, carry out after tail bit convolution coding and the modulation, can be according to the air interface of institute's accepted standard, modulated code element is changed, these air interfaces that are used for transfer of data for example comprise that code division multiple access inserts or OFDM (OFDM, Orthogonal Frequency DivisionMultiplexing).For example above-mentioned signal can be transformed into the OFDM subcarrier and transmit, and for example adopts mimo antennas technology (MIMO, Multiple In Multiple Out) or beam shaping (beam-forming) technology to transmit.
In the realization of the embodiment of the following stated, a kind of frame structure with the overhead symbol of simplifying has been described, this frame structure has the capacity and the more efficient design of increase.In addition, this frame structure only needs can reach the false alarm similar with traditional scheme and leak sign indicating number detection performance at receiving terminal than low transmission power or lower signal to noise ratio (Eb/N0).In addition, in certain embodiments,, need and not leak between the sign indicating number detection performance and make any compromise at false alarm owing in the information bit of some certain embodiments, used cyclic redundancy check bits.Cyclic redundancy check bits also can be used for during other realizes, these realizations comprise and be applied to user profile that transport format information and subcarrier or channelizing coding etc. can be used for the information bit of fault monitoring.In certain embodiments, influence the factor of compromising between false alarm and leakage sign indicating number detection probability and comprise cyclic redundancy check bits and required false alarm rate.When the number of cyclic redundancy check bits can not provide lower false alarm rate very little, then need false alarm and leak a sign indicating number detection probability to compromise.
Embodiment as herein described can be used for realizing processing to different control channel information at ultra-wideband communication system for example.Accordingly, embodiment as herein described need consider the requirement for particular channel when realizing.
Fig. 1 is a schematic diagram, and it has set forth a control channel encoder instances according to an embodiment of system and method as herein described.This control channel encoder 100 shown in Figure 1 for example can be included in a ultrahigh speed data-rate data and optimize in the forward link transmitter or reverse link transmitter in (UHDR-DO, Ultra High Data Rate-DataOptimized) system.For example this encoder 100 can be used on the forward link to Wireless Telecom Equipment transmission forward pilot quality indicator channel information.In another embodiment, this encoder 100 can be used for carrying out transfer of data at the reverse link of reverse cdma Dedicated Control Channel or reverse shared control channel to receiver.Be appreciated that identical with all embodiment as herein described, shown in Figure 1 encoder 100 can pass through software, hardware or above in conjunction with realizing.
Therefore, encoder 100 shown in Figure 1 can be used for indication information is encoded, and for example the reverse-link pilot frequency intensity on the quick pilot quality indicating channel of each Active Terminal is encoded, and this reverse-link pilot frequency intensity is encoded to 4 bit informations usually.As shown in the figure, encoder 100 comprises a cyclic redundancy check (CRC) coding module 102, and this cyclic redundancy check (CRC) coding module 102 is used to receive the data of 4 bit indicator for example to produce the bit b of given number.Cyclic redundancy check (CRC) coding module 102 is used for this cyclic redundancy check bits c is increased to input sequence of data bits b.In example shown in Figure 1, one 4 bit indicator produces 4 bit data flows.2 cyclic redundancy check bits increase to and form 6 bit symbols among this input bit b, and this 6 bit symbol is as the input of tail bit convolution encoder 104.In certain embodiments, use switched cyclic redundancy check bits c that a little improvement on the performance can be provided.Yet be appreciated that in other embodiments, non-switched cyclic redundancy check bits also can increase in the cyclic redundancy check (CRC) coding module 102.At receiving terminal, cyclic redundancy check bits can be used for determining false alarm and leak the sign indicating number detection probability.Below cyclic redundancy check (CRC) coding module 102 is further described.
The output signal of cyclic redundancy check (CRC) coding module 102 comprises b+c bit, and this output signal is as tail bit convolution encoder 104 input signals.Be appreciated that convolution coder is that the input bit of k is converted to the bit sequence that length is n, wherein k=b+c with length.At receiving terminal, length is that bit sequence or the code element of n can be used for determining k bit.Therefore the efficient coding speed of this encoder 102 is R=k/n.
Be appreciated that, in a traditional convolution coder, the tail bit sequence must be increased to the ending of the sequence that is produced, thereby correctly finish whole cataloged procedure.Usually the tail bit sequence is a succession of ' 0 ' sequence of forming, and these connect ' 0 ' sequence and increase in the expense relevant with data control channel.The tail bit means the set initial state of encoder and is last m bit of this information sequence, and wherein m is the length of register in the size of memory or the encoder.Therefore the initial state of encoder is identical code word state with done state, thereby has eliminated the loss of the relevant code rate of traditional convolution coder.In other words, eliminated the needs of tail bit sequence and reduced expense.
In certain embodiments, the multinomial of convolution coder generation can be for example 0157 and 0127 octal system generator polynomial.
The output signal of tail bit convolution encoder 104 is as the input signal of interleaver 106.Interweaving is a kind of mode with discontinuous mode array data, and its purpose is to improve performance.Interweave and be mainly used in the digital data transfer technology to reduce the burst error in the transmission course.These burst errors are rewritten a succession of bit, and are to occur at random.Interweave is exactly to be used to address these problems.In interlace operation, all data send by some control bits, and these control bits are independent of this deinterleaving method.These control bits can be correction bits, the bit that the quilt that this correction bits can make channel decoder correct some is rewritten.When burst error takes place, if the bit number of being rewritten then can not carry out correct decoding to this code word more than bit number that can error correction.Therefore be used further to transmission after some code words or code element being interweaved.In this manner, a burst error only influences the correct bit of some in each code word, so decoder can carry out correct decoding to code word.
Afterwards the output signal of interleaving block 106 is carried out demodulation, for example use quaternary PSK to carry out demodulation, and mapping (map) is used for transmission to specific OFDM point (tone), it is the OFDM subcarrier that OFDM point also can be described as the OFDM tone, below this is specifically described.In transmission course, utilize diversity (diversity) gain to transmit as much as possible.Correspondingly, each quick pilot quality indicating channel code element can use 3 (tile) to transmit.And the minimum Eustachian distance (minimum Euclidian distance) that uses tail bit convolution coding to be improved, tail bit convolution coding comprises the cyclic redundancy check (CRC) check bit through conversion for example shown in Figure 1, and the minimum euclidean distance of improvement can for example reach 12.
Fig. 2 is a schematic diagram, and it has described the example of a control channel encoder according to an embodiment of system and method as herein described.Encoder 200 shown in Figure 2 can be included in the transmitter that for example uses in forward link or the reverse link in a ultrahigh speed data-rate data optimization system.Especially this encoder 200 can be used for the forward link of Wireless Telecom Equipment to transmit the forward pilot quality indicator channel, forward direction quick other sector interference channel, perhaps forward direction heat noise channel.In one embodiment, encoder 200 can be used for reverse link with transmission reverse cdma Dedicated Control Channel or reverse shared control channel at receiving terminal.
Be appreciated that identical with all embodiment as herein described, shown in Figure 2 encoder 200, can pass through software, hardware or above in conjunction with realizing.
Therefore, encoder 200 shown in Figure 2 can be used for indication information is encoded, for example other sector interface index signal on other sector interference channel of forward direction is encoded, perhaps the thermal noise information interference signal on the forward direction heat noise channel is encoded, these codings are generally 4 bits.Each above-mentioned channel all can obtain lower error rate, and for example its error rate can be low to moderate 1%, also can tolerate higher error rate simultaneously, and for example the error rate of its tolerance can be as high as 10%.
As shown in the figure, encoder 200 comprises a cyclic redundancy check (CRC) verification module 202, and this verification module is used for receiving for example 4 bit index signals, to produce the bit b of given number.Cyclic redundancy check (CRC) coding module 202 is used for cyclic redundancy check bits c is increased to input sequence of data bits b.In the example of Fig. 2, one 4 bit indicator produces 4 bit data flows.2 cyclic redundancy check bits c increase among this input bit b to form 6 bit symbols, and this 6 bit symbol is as the input of tail bit convolution encoder 204.In specific realization, use through the cyclic redundancy check bits of conversion and can bring certain performance boost.Yet be appreciated that in other embodiments, also can will do not increase in the cyclic redundancy check (CRC) coding module 202 through the cyclic redundancy check bits c that changes.Cyclic redundancy check bits can be used for determining the false alarm of receiver or leak the sign indicating number detection probability.Below a realization example of cyclic redundancy check (CRC) coding module 204 is done specific descriptions.
The output of cyclic redundancy check (CRC) coding module 202 comprises b+c bit, and this b+c bit is as the input signal of tail bit convolution encoder 204.Be appreciated that under the situation of k=b+c convolution coder is that the bits switch of k is that length is the bit sequence of n with length.At receiving terminal, this n bit sequence or code element can be determined k bit.Therefore, the efficient coding speed of encoder 202 is R=k/n.
Afterwards the output signal of tail bit convolution encoder 204 is modulated, for example use quaternary PSK to modulate, and be mapped to specific OFDM point and be used for transmission, it is subcarrier that OFDM point also can be described as the OFDM tone, below this is specifically described.Compared to embodiment shown in Figure 1, embodiment shown in Figure 2 can provide the minimum Eustachian distance of increase, for example deciphers probability and lower code word error rate preferably when Euclidean distance can provide for 12 the time.And, also can use the generator polynomial 0157 and 0127 of 8 systems in conjunction with embodiment shown in Figure 2.
Fig. 3 is a schematic diagram, and it has set forth a realization example of cyclic redundancy check (CRC) coding module in conjunction with an embodiment.As shown in Figure 3, cyclic redundancy check (CRC) coding module 102 or 202 comprises an input 301, and this input 301 is used to receive input bit b, also comprises an output 303, and this output 303 is used for sending output bit k.The cyclic redundancy check (CRC) coding module of realizing among Fig. 3 also comprises 3 switch 308a, 308b and 308c, when these switches are in the upper end, receives information bit b.This moment, these input bits b promptly was sent to output 303 from input 301.
In order to increase cyclic redundancy check bits, switch 308a, 308b and 308c transfer to the lower end, and input 305,307 is connected to encoder 300.In this example, input 305 and 307 is used to encoder 300 companies of generation 0 sequence.Encoder 300 comprises 2 single-bit memory register 302a, 302b, and this single-bit memory register is used to store each register at the input signal of a clock cycle, and input signal moved to right and is sent to mould 2 accumulators 304.The output of mould 2 accumulators 304 is the output signal of output 303.In the example depicted in fig. 3,2 cyclic redundancy check bits c increase among the information bit b.
Fig. 4 is a schematic diagram, and it has set forth the realization example of cyclic redundancy check (CRC) coding module 102 or 202 in conjunction with an embodiment.As shown in the figure, the cyclic redundancy check (CRC) coding module 102 or 202 among Fig. 4 comprises that an input 401 is used to receive input bit b, comprises that also an output 403 is used for sending output bit k.The cyclic redundancy check (CRC) coding module of realizing among Fig. 4 102,103 also comprises 3 switch 408a, 408b and 408c, when these switches are in the upper end, receives information bit b.This moment, these input bits b promptly was sent to output 403 from input 401.
In order to increase cyclic redundancy check bits, switch 408a, 408b and 408c transfer to the lower end, and input 405 and 407 is connected to encoder 400.In this example, input 405 and 407 is used to encoder 400 companies of generation 0 sequence.Encoder 400 comprises 2 single-bit memory register 402a and 402b, and this single-bit memory register is used to store each register at the input signal of a clock cycle, and input signal moved to right and is sent to mould 2 accumulators 404.The output of mould 2 accumulators 404 is as the input signal of transducer 406.Transducer 406 is used for output 403 is changed and be sent to the output signal of accumulator 404.In the example depicted in fig. 4,2 cyclic redundancy check bits c increase among the information bit b.
Fig. 5 is a flow chart, and its embodiment according to system and method as herein described has set forth the information on the control channel is carried out the Methods for Coding example.At first, in step 502, produce data bit b.In step 504, produce cyclic redundancy check bits c according to the data bit b that produces, afterwards cyclic redundancy check bits c is increased to data bit b.In step 506, use tail bit convolution cataloged procedure that the input results code element is encoded with the produce output result code element.In certain embodiments, code element interweaves to exporting as a result in step 508.In step 510, the result who interweaves is modulated, for example use modulation systems such as biphase phase shift keying, quaternary PSK, quadrature amplitude modulation.In step 512, can do further modulation to the output result of modulation to be used for transmission at last, for example employing code division multiple access inserts or the OFDM modulation system.
Fig. 6 is a flow chart, and its embodiment according to system and method as herein described has set forth the information on the control channel is carried out the Methods for Coding example.At first, in step 602, produce data bit b.In step 604, produce cyclic redundancy check bits c according to the data bit b that produces, afterwards cyclic redundancy check bits c is increased to data bit b.In step 606, use tail bit convolution cataloged procedure to output as a result code element encode to produce output symbol.In step 608, use formula R=k/n that length is converted to the bit sequence of length as n as the output symbol of k, wherein R is the efficient coding speed of encoder, k=b+c, b is a plurality of bit numbers that the cyclic redundancy check (CRC) coding module produces according to information bit, the cyclic redundancy check bits number that c produces for the cyclic redundancy check (CRC) coding module.In step 610, the output symbol of step 608 is interweaved.In certain embodiments, can be before the bit sequence of n is changed to length, promptly the output symbol to step 606 interweaves before the step 608.In step 612, output symbol is modulated, for example use modulation systems such as biphase phase shift keying, quaternary PSK, quadrature amplitude modulation.In step 614, can do further modulation to the output result of modulation to be used for transmission at last, for example employing code division multiple access inserts or the OFDM modulation system.
Fig. 7 is a flow chart, and its embodiment according to system and method as herein described has set forth the information on the control channel is carried out the Methods for Coding example.At first, in step 702, produce data bit b.In step 704, produce cyclic redundancy check bits c according to the data bit b that produces, afterwards cyclic redundancy check bits c is increased to data bit b.In step 706, use tail bit convolution cataloged procedure to output as a result code element encode to produce output symbol.In step 708, the result who interweaves is modulated, for example use modulation systems such as biphase phase shift keying, quaternary PSK, quadrature amplitude modulation.In step 710, can do further modulation to the result of modulation to be used for transmission at last, for example employing code division multiple access inserts or the OFDM modulation system.
As mentioned above, can carry out control channel information coding in the base station, also can carry out the control channel information coding at the access point that is used to control Wireless Telecom Equipment communication.Be appreciated that,, adopt maximized diversity mode, for example time diversity or space diversity in order to reach best performance.
In above-described specific embodiment of the present invention, be appreciated that embodiment as herein described only is a kind of example.Correspondingly, the present invention is not limited among the above-described embodiment, and invention scope described here only is confined in conjunction with above description and illustrated claims.
Claims (14)
1. a transmitter that is used for transmission information bit comprises channel encoder, and this channel encoder is used for this information bit is encoded and transmitted on control channel, and this transmitter comprises:
The cyclic redundancy check (CRC) coding module is used to receive this information bit, produces cyclic redundancy check bits, and increases this cyclic redundancy check bits formation input bit in this information bit;
Tail bit convolution encoder, be connected to this cyclic redundancy check (CRC) coding module, this tail bit convolution encoder is used for producing output symbol by tail bit technology according to this input bit, this tail bit convolution encoder uses formula R=k/n, with length is that this input bit of k is converted to the bit sequence that length is n, wherein R is the efficient coding speed of this tail bit convolution encoder, k=b+c, wherein b is a plurality of bit numbers that this tail bit convolution encoder is encoded and produced this input bit, and c is this cyclic redundancy check bits number that this tail bit convolution encoder produces; And
Modulation module is used for this output symbol is modulated.
2. transmitter according to claim 1, also comprise interleaving block, this interleaving block is connected to this tail bit convolution encoder, and wherein this interleaving block is used for this output symbol is carried out interlace operation, and this output symbol that will interweave sends to this modulation module.
3. transmitter according to claim 1, wherein this information bit is following at least one channel information bit:
Forward pilot quality indicator channel information bit;
Forward direction is other sector interference channel information bit fast; And
Ongoing interface heat noise channel information bit.
4. transmitter according to claim 1, wherein this cyclic redundancy check (CRC) coding module also is used for this cyclic redundancy check bits is changed, and this cyclic redundancy check bits is increased to this information bit.
5. transmitter according to claim 1, wherein this tail bit convolution encoder has this efficient coding speed of R=1/2, receives this input bit of 6 bits, and wherein 4 bits are this information bit b, and 2 bits are this cyclic redundancy check bits c.
6. the method for a transmission information bit is used at leading channel this information bit being encoded, and comprising:
Receive this information bit;
Produce cyclic redundancy check bits, this cyclic redundancy check bits is used for this information bit is carried out cyclic redundancy check (CRC);
This cyclic redundancy check bits that produces is increased to this information bit, produce input bit according to efficient coding speed R;
Use tail bit technology to produce output symbol according to this input bit;
Use formula R=k/n, with length is that this output symbol of k is converted to the bit sequence that length is n, k=b+c wherein, a plurality of bit numbers that b encodes and produces this output symbol for this tail bit convolution encoder, c are this cyclic redundancy check bits number that this tail bit convolution encoder produces; And
This output symbol is modulated.
7. method according to claim 6 also comprises:
This output symbol is interweaved; And
This output symbol that has interweaved is sent and modulates.
8. method according to claim 6, wherein this information bit is at least with next channel information bit:
Forward pilot quality indicator channel information bit;
Forward direction is other sector interference channel information bit fast; And
Ongoing interface heat noise channel information bit.
9. method according to claim 6, this input bit of wherein said formation also comprises to be changed this cyclic redundancy check bits, and this cyclic redundancy check bits is increased to this information bit.
10. access point apparatus that is used for transmission information bit comprises:
Receiver is used to receive coded signal; And
Transmitter is used to produce this coded signal that transmits, and this transmitter comprises channel encoder, and this channel encoder is used for this information bit is encoded, and this channel encoder also comprises:
The cyclic redundancy check (CRC) coding module is used to receive this information bit, produces cyclic redundancy check bits, and increases this cyclic redundancy check bits formation input bit in this information bit;
Tail bit convolution encoder, be connected to this cyclic redundancy check (CRC) coding module, this tail bit convolution encoder is used for producing output symbol by tail bit technology according to this input bit, this tail bit convolution encoder uses formula R=k/n, with length is that this input bit of k is converted to the bit sequence that length is n, wherein R is the efficient coding speed of this tail bit convolution encoder, k=b+c, wherein b is a plurality of bit numbers that this tail bit convolution encoder is encoded and produced this input bit, and c is this cyclic redundancy check bits number that this tail bit convolution encoder produces; And
Modulation module is used for this output symbol is modulated.
11. access point apparatus according to claim 10, also comprise interleaving block, this interleaving block is connected to this tail bit convolution encoder, and wherein this interleaving block is used for this output symbol is carried out interlace operation, and this output symbol that will interweave sends to this modulation module.
12. access point apparatus according to claim 10, wherein this cyclic redundancy check (CRC) coding module also is used for this cyclic redundancy check bits is changed, and this cyclic redundancy check bits is increased to this information bit.
13. a mobile unit that is used for transmission information bit comprises:
Receiver is used to receive coded signal; And
Transmitter is used to produce this coded signal that transmits, and this transmitter comprises channel encoder, and this channel encoder is used for this information bit is encoded, and this channel encoder also comprises:
The cyclic redundancy check (CRC) coding module is used to receive this information bit, produces cyclic redundancy check bits, and increases this cyclic redundancy check bits formation input bit in this information bit;
Tail bit convolution encoder, be connected to this cyclic redundancy check (CRC) coding module, this tail bit convolution encoder is used for producing output symbol by tail bit technology according to this input bit, this tail bit convolution encoder uses formula R=k/n, with length is that this input bit of k is converted to the bit sequence that length is n, wherein R is the efficient coding speed of this tail bit convolution encoder, k=b+c, wherein b is a plurality of bit numbers that this tail bit convolution encoder is encoded and produced this input bit, and c is this cyclic redundancy check bits number that this tail bit convolution encoder produces; And
Modulation module is used for this output symbol is modulated.
14. mobile unit according to claim 13, also comprise interleaving block, this interleaving block is connected to this tail bit convolution encoder, and wherein this interleaving block is used for this output symbol is carried out interlace operation, and this output symbol that will interweave sends to this modulation module.
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| CNA2007101964396A CN101286815A (en) | 2007-12-03 | 2007-12-03 | Channel encoding apparatus and method in wireless communication system |
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| CNA2007101964396A CN101286815A (en) | 2007-12-03 | 2007-12-03 | Channel encoding apparatus and method in wireless communication system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958541A (en) * | 2010-09-10 | 2011-01-26 | 中国电力科学研究院 | Serial coding method for implementing reliable trigger of direct-current power transmission converter valve |
| WO2013127332A1 (en) * | 2012-02-28 | 2013-09-06 | 华为终端有限公司 | Control channel modulation and demodulation method, base station and user equipment |
-
2007
- 2007-12-03 CN CNA2007101964396A patent/CN101286815A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958541A (en) * | 2010-09-10 | 2011-01-26 | 中国电力科学研究院 | Serial coding method for implementing reliable trigger of direct-current power transmission converter valve |
| CN101958541B (en) * | 2010-09-10 | 2014-07-23 | 中国电力科学研究院 | Serial coding method for implementing reliable trigger of direct-current power transmission converter valve |
| WO2013127332A1 (en) * | 2012-02-28 | 2013-09-06 | 华为终端有限公司 | Control channel modulation and demodulation method, base station and user equipment |
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