CN104917533B - A kind of I/Q data compression method, device and system - Google Patents
A kind of I/Q data compression method, device and system Download PDFInfo
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Abstract
The invention discloses a kind of I/Q data compression method, device and system, including：By the basic frame rate of CPRI agreements, fixed packet time length is determined；Determine the number of the sampling point of current basic frame transmission in the CPRI agreements；According to the I datum of the sampling point or the amplitude situation of Q data, the redundant data bits in the I datum or Q data are removed respectively, obtain displacement configured information and compressed sampling point data；The displacement configured information and the compressed sampling point data are filled into CPRI protocol formats respectively, are transmitted.I/Q data compression method, device and system provided by the present invention, I datum is separately handled with Q data, avoid the occurrence of that the high Q data amplitude of I datum amplitude is low or the low Q data amplitude of I datum amplitude it is high and the defects of cause compression performance to decline.
Description
Technical field
The present invention relates to technical field of data compression, more particularly to a kind of I/Q data compression method, device and system.
Background technology
Swift and violent with TD-LTE wireless bandwidths increases, and new requirement is proposed, it is necessary to more to optical fiber base band transmission ability
The SERDES of high speed and corresponding optical module, equipment cost increase therewith, therefore PCB design and hardware reliability also face
Bigger challenge.According to bandpass signal quadrature decimation correlation theory, the LTE signals of 20MHz can be drawn into 20.48MSPS, still
It is drawn into designs of the 20.48MSPS to digital filtering and adds great difficulty, moderate scheme is to be drawn into 24.576MSPS, right
MIMO is the TD-LTE of 2x2, is that 12bit calculates its data throughput as 24.576*2*12*2=using I/Q
1179.648Mbps, along with PCS layers of 8B/10B are encoded, needs 1474.56Mbps altogether, current most common 1.25Gbps optical modes
Block can not meet transmission requirement, it is necessary to optical module more at a high speed, expensive.Therefore, in this case, if can try to reduce number
According to handling capacity, make it to realize transmission with common low speed optical module, will be very with practical value.
Existing scheme one：The method and device being compressed to inphase quadrature signal I/Q data, it is to I datum and Q data
Do not handle separately, and since I differs 90 ° of relations with both Q phases, amplitude difference can be very big, causes actual compression efficiency
It is very low；In addition block length is not moderate enough, and being grouped too small (such as 4 sampling points) can cause compressibility factor to tie up mass efficient coding,
Compression efficiency can be caused low, be grouped excessive (32 sampling point), since amplitude peak with minimum radius differs larger, cause compression performance
Decline.
Existing scheme two：Scheme 1 similar with system to I/Q data compression method, with I^2+Q^2 digital powers as reference
Without I and Q is distinguished, for example I amplitudes are very high, and Q amplitudes are very low, cause to take into account and lead, and cause compression performance to decline；Need to pass
Defeated block length, ties up and causes efficient coding, compression efficiency can be caused low, while increase design complexities；Block length mistake
Long, amplitude peak differs larger with minimum radius, causes compression performance to decline.
Therefore it provides one kind can separately be handled I datum with Q data, and effectively improve the method, apparatus of compression performance
And system is necessary.
The content of the invention
The object of the present invention is to provide a kind of I/Q data compression method, device and system, it is therefore intended that solves existing skill
The problem of not handled separately I datum and Q data in art and causing compression performance to decline.
In order to solve the above technical problems, the present invention provides a kind of I/Q data compression method, including：
By the basic frame rate of CPRI agreements, fixed packet time length is determined；
Determine the number of the sampling point of current basic frame transmission in the CPRI agreements；
According to the I datum of the sampling point or the amplitude situation of Q data, the redundancy in the I datum or Q data is removed respectively
Data bit, obtains displacement configured information and compressed sampling point data；
The displacement configured information and the compressed sampling point data are filled into CPRI protocol formats respectively, into
Row is sent.
Alternatively, further include：
Receiving terminal determines currently to receive the number of the sampling point of basic frame transmission according to basic frame number and hyperframe number is received
Mesh；The compressed sampling point data are unziped it by the displacement configured information.
Alternatively, further include：
By the output speed of Digital Down Converter Module and the basic frame rate of the CPRI agreements, transmission rate is determined
32 sampling points are transmitted for every 5 basic frames, first three cycle transmits 6 sampling points respectively, latter two cycle transmits 7 samples respectively
Point.
Alternatively, the number of the sampling point of the current basic frame transmission for determining the CPRI agreements includes：
Calculated by carrying out modulus 5 to the basic frame number of the CPRI agreements, when result is 0,1 or 2, determine current base
The number of the sampling point of this frame transmission is 6；When result is 3 or 4, the number for determining the sampling point of current basic frame transmission is 7.
Alternatively, it is described according to the I datum of the sampling point or the amplitude situation of Q data, the I datum or Q are removed respectively
Redundant data bits in data, obtaining displacement configured information and compressed sampling point data includes：
According to the I datum of the sampling point or the amplitude situation of Q data, 4 in the I datum or Q data are removed respectively
Redundant data bits, by 12 bit data boil down to, 8 bit data.
Present invention also offers a kind of I/Q data compression set, including：
First determining module, for by the basic frame rate of CPRI agreements, determining fixed packet time length；
Second determining module, for determining the number of the sampling point of current basic frame transmission in the CPRI agreements；
Compression module, for the I datum according to the sampling point or the amplitude situation of Q data, remove respectively the I datum or
Redundant data bits in Q data, obtain displacement configured information and compressed sampling point data；
Sending module, for the displacement configured information and the compressed sampling point data to be filled into CPRI respectively
In protocol format, it is transmitted.
Alternatively, further include：
Decompression module, for according to basic frame number and hyperframe number is received, determining currently to receive basic frame transmission
The number of sampling point；The compressed sampling point data are unziped it by the displacement configured information.
Alternatively, further include：
3rd determining module, the basic frame for the output speed by Digital Down Converter Module and the CPRI agreements
Frequency, determines that transmission rate transmits 32 sampling points for every 5 basic frames, first three cycle transmits 6 sampling points, latter two week respectively
Phase transmits 7 sampling points respectively.
Present invention also offers under a kind of I/Q data compressibility, including mimo antennas, analog-to-digital conversion module, numeral
I/Q data compression set described in frequency-variable module, optical fiber and any of the above-described.
I/Q data compression method, device and system provided by the present invention, I datum is separately handled with Q data, is avoided
The defects of occurring that the high Q data amplitude of I datum amplitude is low or the low Q data amplitude of I datum amplitude is high, and causing compression performance to decline.
Meanwhile the principle that will not be mutated in a short time according to signal amplitude, choose the time window conduct of CPRI one basic frame of agreement
Fixed packet length, avoids that block length is too long to cause compression accuracy to decline, and block length too short-range missile causes efficient coding
The problem of efficiency reduces.
Further, block length is fixed value in the present invention, makes design simplerization, receiving terminal is easy to recover original
Data, and need not transmission packe length parameter, effectively increase code efficiency.
Brief description of the drawings
Fig. 1 is a kind of flow chart of embodiment of I/Q data compression method provided by the present invention；
Fig. 2 is the flow chart of another embodiment of I/Q data compression method provided by the present invention；
Fig. 3 is the general frame schematic diagram that I/Q data compression method provided by the present invention uses system；
Fig. 4 is the flow chart of another embodiment of I/Q data compression method provided by the present invention；
Fig. 5 is data compression CPRI framing format schematic diagram A (6 samples of I/Q data compression method provided by the present invention
Point)；
Fig. 6 is data compression CPRI framing format schematic diagram B (7 samples of I/Q data compression method provided by the present invention
Point)；
Fig. 7 is a kind of structure diagram of embodiment of I/Q data compression set provided by the present invention.
Embodiment
In order to make those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.Obviously, described embodiment is only part of the embodiment of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower all other embodiments obtained, belong to the scope of protection of the invention.
A kind of flow chart of embodiment of I/Q data compression method provided by the present invention is as shown in Figure 1, the party
Method includes：
Step S101：By the basic frame rate of CPRI agreements, fixed packet time length is determined；
Step S102：Determine the number of the sampling point of current basic frame transmission in the CPRI agreements；
Step S103：According to the I datum of the sampling point or the amplitude situation of Q data, the I datum or Q numbers are removed respectively
Redundant data bits in, obtain displacement configured information and compressed sampling point data；
Step S104：The displacement configured information and the compressed sampling point data are filled into CPRI agreements respectively
In form, it is transmitted.
I/Q data compression method provided by the present invention, I datum is separately handled with Q data, avoids the occurrence of I datum amplitude
High Q data amplitude is low or the low Q data amplitude of I datum amplitude is high, and the defects of cause compression performance to decline.Meanwhile according to signal
The principle that amplitude will not be mutated in a short time, chooses the time window of CPRI one basic frame of agreement as fixed packet length,
Avoid that block length is too long to cause compression accuracy to decline, and block length too short-range missile causes what efficient coding efficiency reduced to ask
Topic.
Further, block length is fixed value in the present invention, makes design simplerization, receiving terminal is easy to recover original
Data, and need not transmission packe length parameter, effectively increase code efficiency.
The flow chart of another embodiment of I/Q data compression method provided by the present invention as shown in Fig. 2, with
A upper embodiment is compared, and receiving terminal is added in the present embodiment and receives the part unziped it, specifically, this method includes：
Step S201：By the basic frame rate of CPRI agreements, fixed packet time length is determined；
Step S202：Determine the number of the sampling point of current basic frame transmission in the CPRI agreements；
Step S203：According to the I datum of the sampling point or the amplitude situation of Q data, the I datum or Q numbers are removed respectively
Redundant data bits in, obtain displacement configured information and compressed sampling point data；
Step S204：The displacement configured information and the compressed sampling point data are filled into CPRI agreements respectively
In form, it is transmitted；
Step S205：Receiving terminal determines currently to receive basic frame transmission according to basic frame number and hyperframe number is received
The number of sampling point；The compressed sampling point data are unziped it by the displacement configured information.
I/Q data compression method provided by the present invention has the following advantages that：
(1) principle that will not be mutated in a short time according to signal amplitude, chooses the time window of CPRI 1 basic frame of agreement
So can be to be optimal every group of compression accuracy as block length；Block length is too long, then sampling point amplitude from minimum to
Maximum whole section is likely to occur, and causes compression accuracy to decline；Block length is too short, then efficient coding efficiency reduces；
(2) compression is opened by I and Q points, since sampling point power is I^2+Q^2,90 ° of I and Q phase differences, separately compressing to keep away
The defects of compression accuracy reduces during the fact that exempting from the very big Q very littles of I or I very littles Q very big；
(3) fixed packet length simplifies design, and recipient is easy to recover initial data, and need not transmission packe length
Parameter is spent, efficient coding efficiency improves.
I/Q data compression method provided by the present invention can be specifically used in following systems, the general frame signal of the system
For figure as shown in figure 3, Fig. 3 includes uplink and downlink, it is as follows that following behavior example describes whole signal stream process：Mimo antenna configures for 2x2,
LO completes radio frequency and realizes analog-to-digital conversion to the down coversion of intermediate frequency, AD6655, and the real number signal of 2 road 122.88MSPS of output is given
FPGA carries out subsequent treatment；DDC in FPGA is Digital Down Converter Module, and it is that the 122.88MSPS that AD6655 is exported is real that it, which is inputted,
Signal, output are then the I/Q baseband signals of 2 road 24.576MSPS, realize 5:1 extracts.
In order to meet the optical module of follow-up 1.25Gbps transmit, I/Q data compression method provided by the present invention to
Data throughput is reduced, is then passed to the processing of CPRI modules framing, the SEDES modules embedded through FPGA are transferred to far by optical fiber
End；The SERDES that distal end is embedded by FPGA recovers data, is handled by CPRI frame decodings, then data are unziped it with behaviour
Make, recover legacy data, be then transferred to DUC modules；DUC is Digital Up Convert module, with DDC just on the contrary, its input is 2
The I/Q baseband signals of the 24.576MSPS on road, output are then the i/q signals of the 122.88MSPS on 2 tunnels, realize 1:5 interpolations, then give
Digital-to-analogue conversion is completed to follow-up AD9788；The upconversion process of if-to-rf is completed via LO again.
Based on said system, the flow chart of another embodiment of I/Q data compression method provided by the present invention
As shown in figure 4, this method includes：
Step S301：By the basic frame rate of CPRI agreements, fixed packet time length is determined；
The characteristic close to white noise, the basic frame rate of CPRI is presented in the power spectral density of TD-LTE in its effective bandwidth
It is 3.84MHz i.e. 260.417ns, the cycle is shorter.In view of the impossible abrupt transients of power, that is, amplitude of signal, with reference to above-mentioned spy
Property, it is the minimum period come sectional compression to use 1/3.84 μ s.
Due to the 1/3.84 μ s that every frame is always fixed, (6 sampling points or 7 samples that the sampling point number transmitted every time is always to determine
Point), the number of expense prompting recipient's present frame sampling point can need not be so further added by, while reduce design complexities.
Step S302：By the output speed of Digital Down Converter Module and the basic frame rate of the CPRI agreements, really
Determine transmission rate and transmit 32 sampling points for every 5 basic frames, first three cycle transmits 6 sampling points, latter two cycle difference respectively
Transmit 7 sampling points；
In the present embodiment, the speed of DDC outputs is 24.576MSPS, and the frame rate of CPRI agreements is 3.84MHz,
24.576/3.84=6.4, namely each basic frame needs to transmit 6.4 sampling points, it is therefore desirable to is transmitted in every 5 basic frames
32 sampling points." 6,6,6,7, the 7 " number as transmission sampling point in 5 wheels, 6 sampling point of the first round, the second 6 samples of wheel can specifically be used
Point, 6 sampling point of third round, 7 sampling point of fourth round, the 5th 7 sampling points of wheel.
Step S303：Calculated by carrying out modulus 5 to the basic frame number of the CPRI agreements, when result is 0,1 or 2,
The number for determining the sampling point of current basic frame transmission is 6；When result is 3 or 4, the number of the sampling point of current basic frame transmission is determined
Mesh is 7；
Step S304：According to the I datum of the sampling point or the amplitude situation of Q data, the I datum or Q numbers are removed respectively
4 redundant data bits in, by 12 bit data boil down to, 8 bit data；
What DDC modules exported is the binary system signed number of 12bit, using the characteristic of signed number, can be removed wherein
Unnecessary redundant data bits realize the purpose of compression.Its method is as follows：Assuming that there is the original I sampling point (0000_ of 4 12bit
0101_0101,0000_0011_1111,1111_1010_1010,1111_1101_1010), then can be by high 4 removals, pressure
It is changed into (0101_0101,0011_1111,1010_1010,1101_1010) after contracting to represent to eliminate with displacement configured information 0100
It is 4 high, when distal end receives, according to displacement configured information, by highest order symbol Bits Expanding 4, in such a case, it is possible to reach
Lossless compression；And another extreme case then assumes that original Q sampling points (0101_0101_0101, the 0111_ of 4 12
1111_1111,1010_1010_1010,1001_1010_1001), then low 4 removals can be changed into (0101_ after compression
0101,0111_1111,1010_1010,1001_1010) represented to eliminate low 4 with displacement configured information 1100, distal end receives
When, according to displacement configured information, by minimum Bits Expanding 4, in this case, partial loss can be caused to original signal, but
It is due to that the information such as frequency and the amplitude of data are mainly determined by higher bit, information loss caused by this compression influences little.
Specifically, as shown in Fig. 5 and Fig. 6 data compression CPRI framing format schematic diagrames, Fig. 5 is the compression group of 6 sampling points
Frame format, Fig. 6 are the compression framing format of 7 sampling points.C＆M is used for the clock synchronization needed for CPRI agreements and management frame biography in figure
I datum compression displacement instruction defeated, that LTE0_I_Shift is LTE0 in present frame, LTE0_Q_Shift/LTE1_I_Shift/
LTE1_Q_Shift is similarly corresponding compression displacement instruction.LTE0.Di (i=0,1,2,3,4,5,6) represents 6 sampling points of LTE0
Or 7 sampling point data, LTE1.Di similarly represent 6 sampling points or 7 sampling points of LTE1, BLANK represents empty data, is defaulted as full 0.
Wherein several are removed according to the amplitude situation of the I of the LTE0 of this 6 sampling point (or 7 sampling points), it is then determined that this base
The value (being used to recipient's frame decoding recover) of this frame LTE0_I_Shift；
Similarly, wherein several are removed according to the amplitude situation of the Q of the LTE0 of this 6 sampling point (or 7 sampling points), it is then determined that
The value of this basic frame LTE0_Q_Shift；
Similarly, wherein several are removed according to the amplitude situation of the I of the LTE1 of this 6 sampling point (or 7 sampling points), it is then determined that
The value of this basic frame LTE1_I_Shift；
Similarly, wherein several are removed according to the amplitude situation of the Q of the LTE1 of this 6 sampling point (or 7 sampling points), it is then determined that
The value of this basic frame LTE1_Q_Shift；
Step S305：The displacement configured information and the compressed sampling point data are filled into CPRI agreements respectively
In form, it is transmitted；
Wherein, it is currently 6 sampling points of transmission or 7 sampling points that the numbering of the basic frame of current sender and hyperframe number, which determine,.
Step S306：When recipient receives, according to basic frame number and hyperframe number is received, it will be 6 to learn this basic frame
Sampling point or 7 sampling point data；
Step S307：According to 4 kinds displacement indicate data respectively to compressed 8bit LTE0.I, LTE0.Q, LTE1.I,
LTE1.Q carries out reversible decompression operation and reverts to 12bit data.
The program is realized on the FPGA development boards of EP4CGX50CF23I7, the high speed SERDES that FPGA is embedded matches somebody with somebody
1.2288Gbps linear speeds are set to, using the optical module of 1.25Gbps/TX1310/RX1550/10Km parameters, transceiver passes through 1
The optical fiber connection of rice, compresses front and rear parameters performance and is relatively shown in Table 1.
Table 1 compresses front and rear performance comparison
| No Compression | 12:8Compression | |
| Line rate(Gbps) | 2.4576 | 1.2288 |
| reference clock(MHz) | 122.88 | 61.44 |
| Group delay(μs) | 3 | 3.2 |
| EVM(64QAM at min power) | 4% | 4.1% |
By table 1 as it can be seen that needing the optical module using 2.5Gbps before compression, while the SERDES of FPGA is also required to reach
The linear speed, reference clock are up to 122.88MHz.After compression, optical module and SERDES linear speeds are original half, and
And reference clock is also reduced to 61.44MHz, hardware PCB design pressure can be mitigated, improve the reliability of optic communication links.
Aspect of performance, delay slightly have being incremented by for 0.2 μ s, this is because needing to introduce FIFO when compression and decompression, to carry out width
Degree judgement, and EVM also has almost no change, this is because this method can almost accomplish lossless compression in small-signal, and believes greatly
Number when, though there is compression losses, signal itself better quality during due to big signal, does not influence the correct demodulation of recipient equally.
A kind of structure diagram of embodiment of I/Q data compression set provided by the present invention was as shown in fig. 7, should
Device includes：
First determining module 1, for by the basic frame rate of CPRI agreements, determining fixed packet time length；
Second determining module 2, for determining the number of the sampling point of current basic frame transmission in the CPRI agreements；
Compression module 3, for the I datum according to the sampling point or the amplitude situation of Q data, removes the I datum respectively
Or the redundant data bits in Q data, obtain displacement configured information and compressed sampling point data；
Sending module 4, for the displacement configured information and the compressed sampling point data to be filled into respectively
In CPRI protocol formats, it is transmitted.
Preferably, I/Q data compression set provided by the present invention can further include：
Decompression module 5, for according to basic frame number and hyperframe number is received, determining currently to receive basic frame transmission
The number of sampling point；The compressed sampling point data are unziped it by the displacement configured information；
3rd determining module 6, for the basic of the output speed by Digital Down Converter Module and the CPRI agreements
Frame rate, determines that transmission rate transmits 32 sampling points for every 5 basic frames, first three cycle transmits 6 sampling points respectively, latter two
Cycle transmits 7 sampling points respectively.
Other settings of I/Q data compression set provided by the present invention are identical with above method setting, no longer superfluous herein
State.
I/Q data compression set provided by the present invention, I datum is separately handled with Q data, avoids the occurrence of I datum amplitude
High Q data amplitude is low or the low Q data amplitude of I datum amplitude is high, and the defects of cause compression performance to decline.Meanwhile according to signal
The principle that amplitude will not be mutated in a short time, chooses the time window of CPRI one basic frame of agreement as fixed packet length,
Avoid that block length is too long to cause compression accuracy to decline, and block length too short-range missile causes what efficient coding efficiency reduced to ask
Topic.
Further, block length is fixed value in the present invention, makes design simplerization, receiving terminal is easy to recover original
Data, and need not transmission packe length parameter, effectively increase code efficiency.
Present invention also offers under a kind of I/Q data compressibility, including mimo antennas, analog-to-digital conversion module, numeral
Frequency-variable module, optical fiber and I/Q data compression set described above.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be with it is other
The difference of embodiment, between each embodiment same or similar part mutually referring to.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide scope caused.
Claims (9)
- A kind of 1. I/Q data compression method, it is characterised in that including：By the basic frame rate of CPRI agreements, fixed packet time length is determined；Determine the number of the sampling point of current basic frame transmission in the CPRI agreements；According to the I datum of the sampling point or the amplitude situation of Q data, the redundant data in the I datum or Q data is removed respectively Position, obtains displacement configured information and compressed sampling point data；The displacement configured information and the compressed sampling point data are filled into CPRI protocol formats respectively, sent out Send.
- 2. I/Q data compression method as claimed in claim 1, it is characterised in that further include：Receiving terminal determines currently to receive the number of the sampling point of basic frame transmission according to basic frame number and hyperframe number is received；It is logical The displacement configured information is crossed to unzip it the compressed sampling point data.
- 3. I/Q data compression method as claimed in claim 1 or 2, it is characterised in that further include：By the output speed of Digital Down Converter Module and the basic frame rate of the CPRI agreements, it is every to determine transmission rate 5 basic frames transmit 32 sampling points, first three cycle transmits 6 sampling points respectively, latter two cycle transmits 7 sampling points respectively.
- 4. I/Q data compression method as claimed in claim 3, it is characterised in that the current base for determining the CPRI agreements The number of the sampling point of this frame transmission includes：Calculated by carrying out modulus 5 to the basic frame number of the CPRI agreements, when result is 0,1 or 2, determine current basic frame The number of the sampling point of transmission is 6；When result is 3 or 4, the number for determining the sampling point of current basic frame transmission is 7.
- 5. I/Q data compression method as claimed in claim 4, it is characterised in that the I datum or Q numbers according to the sampling point According to amplitude situation, remove the redundant data bits in the I datum or Q data respectively, obtain displacement configured information and compression Sampling point data afterwards include：According to the I datum of the sampling point or the amplitude situation of Q data, 4 redundancies in the I datum or Q data are removed respectively Data bit, by 12 bit data boil down to, 8 bit data.
- A kind of 6. I/Q data compression set, it is characterised in that including：First determining module, for by the basic frame rate of CPRI agreements, determining fixed packet time length；Second determining module, for determining the number of the sampling point of current basic frame transmission in the CPRI agreements；Compression module, for the I datum according to the sampling point or the amplitude situation of Q data, removes the I datum or Q numbers respectively Redundant data bits in, obtain displacement configured information and compressed sampling point data；Sending module, for the displacement configured information and the compressed sampling point data to be filled into CPRI agreements respectively In form, it is transmitted.
- 7. I/Q data compression set as claimed in claim 6, it is characterised in that further include：Decompression module, for according to basic frame number and hyperframe number is received, determining currently to receive the sampling point that basic frame transmits Number；The compressed sampling point data are unziped it by the displacement configured information.
- 8. I/Q data compression set as claimed in claims 6 or 7, it is characterised in that further include：3rd determining module, the basic frame frequency for the output speed by Digital Down Converter Module and the CPRI agreements Rate, determines that transmission rate transmits 32 sampling points for every 5 basic frames, first three cycle transmits 6 sampling points, latter two cycle respectively 7 sampling points are transmitted respectively.
- 9. a kind of I/Q data compressibility, it is characterised in that including mimo antennas, analog-to-digital conversion module, Digital Down Convert Module, optical fiber and such as claim 6 to 8 any one of them I/Q data compression set.
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| CN112235828B (en) * | 2020-09-24 | 2022-06-28 | 杭州红岭通信息科技有限公司 | Data compression method based on CPRI protocol |
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| CN101127969A (en) * | 2006-08-14 | 2008-02-20 | 华为技术有限公司 | Method and system for transmitting wireless service data via public wireless interface |
| CN101325737A (en) * | 2007-06-15 | 2008-12-17 | 中兴通讯股份有限公司 | Method for adapting IQ data and CPRI interface of GSM/EDGE |
| CN102790999A (en) * | 2011-05-19 | 2012-11-21 | 中兴通讯股份有限公司 | Data compression, transmission, receiving and uncompressing method and corresponding device |
| CN103326810A (en) * | 2012-03-23 | 2013-09-25 | 京信通信系统（中国）有限公司 | Method and device for sending and receiving in-phase quadrature data |
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| CN104917533A (en) | 2015-09-16 |
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