CN104811216B - A kind of device and its application method for improving receiver dynamic range - Google Patents
A kind of device and its application method for improving receiver dynamic range Download PDFInfo
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- CN104811216B CN104811216B CN201510229720.XA CN201510229720A CN104811216B CN 104811216 B CN104811216 B CN 104811216B CN 201510229720 A CN201510229720 A CN 201510229720A CN 104811216 B CN104811216 B CN 104811216B
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Abstract
The invention discloses a kind of device and its application method for improving receiver dynamic range, device includes reception antenna module, compression module, receiving channel module, ADC, digital recovery module；Described reception antenna module is connected to compression module, and compression module is connected to receiving channel module, and receiving channel module is connected to ADC, and ADC is connected to digital recovery module；Described compression module is compressed to big signal amplitude, to small signal approximation Linear Amplifer；Described digital recovery module is used for the inverse operation that module is compressed to obtained signal.The present invention is compressed by compression module to big signal amplitude, to small signal approximation Linear Amplifer, and then reduces reception signal peak-to-average ratio, improves receiver dynamic range；The data signal received is recovered into the corresponding data signal of original received signal according to the inverse operation of compression module by the way of look-up table maps, operand is greatly reduced；High power signals are adapted to, broadband signal is adapted to, and it is simple in construction.
Description
Technical field
The present invention relates to a kind of conversion equipment of the analog signal in and digital communicating field to data signal and its use
Method, more particularly to a kind of device and its application method for improving receiver dynamic range.
Background technology
In full duplex system, self-interference, beyond receiver dynamic range, causes to connect due to more many by force than receiving signal
Receipts machine saturation.The dynamic range of self-interference signal is reduced, existing method mainly there are three kinds：
1, in the signal subtraction that analog domain reconstructs self-interference signal and then end and antenna are received in front of the receiver.
2, estimate self-interference signal in numeric field, estimation signal is upconverted into rf frequency holds and day in front of the receiver again
The signal subtraction that line is received.
3, transmission signal and the envelope signal received after signal self-mixing, self-mixing are eliminated in zero intermediate frequency.
But the structure of these three methods and its application seem complicated.
The content of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide one kind receiver is improved by reducing peak-to-average force ratio
The device and its application method of dynamic range.
The purpose of the present invention is achieved through the following technical solutions：A kind of device for improving receiver dynamic range,
Including reception antenna module, compression module, receiving channel module, ADC, digital recovery module；Described reception antenna module connects
Compression module is connected to, compression module is connected to receiving channel module, and receiving channel module is connected to ADC, and it is extensive that ADC is connected to numeral
Multiple module；Described compression module is compressed to big signal amplitude, to small signal approximation Linear Amplifer；Described numeral recovery
Module is used for the inverse operation that module is compressed to obtained signal.
Described inverse operation maps for look-up table.
Described compression module uses log-compressed.
A kind of application method for the device for improving receiver dynamic range, it comprises the following steps：
S1：Reception antenna module receives electromagnetic wave signal, and is converted into electric signal h (t), described electric signal h (t)
Including useful signal and the self-interference signal for coming from local transmitter；
S2：Log Compression module is compressed to electric signal h (t), the signal j (t) after being compressed；To big signal amplitude
It is compressed, to small signal approximation Linear Amplifer；
S3：Receiving channel obtains intermediate-freuqncy signal k (t) after carrying out down coversion to the signal j (t) after compression；
S4：ADC sampling intermediate-freuqncy signal k (t) and output digit signals m (n)；
S5：Data signal m (n) is recovered original reception according to the inverse operation of compression module and believed by digital recovery module
Number corresponding data signal x (n).
Boil down to log-compressed described in step S2, the compression function of log-compressed is：
A and B is the constant more than 0 in formula.
Boil down to trigonometric function described in step S2 compresses, and the compression function of trigonometric function compression is：
Boil down to multinomial described in step S2 compresses, and polynomial compression function is：
Inverse operation described in step S5 maps for look-up table, and mapping relations expression formula is：
X (n)=f [m (n)].
The acquisition of described look-up table mapping includes following sub-step：Obtained with m (n) for input by the way of Function Fitting
To mapping, the sufficiently high f of precision [m (n)] can be obtained by repeating enough number of times fit operations.
The beneficial effects of the invention are as follows：
(1) present invention is compressed by compression module to big signal amplitude, to small signal approximation Linear Amplifer, and then is dropped
Low reception signal peak-to-average ratio, improves receiver dynamic range, and suitable for a variety of compress modes.
(2) by the data signal received according to compression by the way of digital recovery module of the invention is mapped using look-up table
The inverse operation of module recovers the corresponding data signal of original received signal, greatly reduces operand.
(3) present invention adapts to high power signals, adapts to broadband signal, and simple in construction.
Brief description of the drawings
Fig. 1 is structure square frame of the present invention and method flow diagram.
Embodiment
Technical scheme is described in further detail below in conjunction with the accompanying drawings：As shown in figure 1, a kind of improve receives motor-driven
The device of state scope, including reception antenna module, compression module, receiving channel module, ADC, digital recovery module；Described connects
Receive Anneta module and be connected to compression module, compression module is connected to receiving channel module, and receiving channel module is connected to ADC, ADC
It is connected to digital recovery module；Described compression module is compressed to big signal amplitude, to small signal approximation Linear Amplifer；Institute
The digital recovery module stated is used for the inverse operation that module is compressed to obtained signal.The principle of compression is that big signal gain is remote
Less than small-signal gain.
Described inverse operation maps for look-up table.
Described compression module uses log-compressed.
Described reception antenna module receives electromagnetic wave signal and is converted into electric signal h (t).
Described compression module is responsible for compression and receives signal, wherein it is linear to be compressed small signal approximation to big signal amplitude
Amplification, reduction receives signal h (t) peak-to-average force ratio and generates j (t).
Described receiving channel module down coversion j (t) to intermediate-freuqncy signal k (t) and the amplification of necessary signal.
ADC is responsible for sampling intermediate-freuqncy signal k (t) and output digit signals m (n).
Digital recovery module is compressed the inverse operation of module, and data signal m (n) is converted into x (n).
Embodiment 1：A kind of application method for the device for improving receiver dynamic range, it comprises the following steps：
S1：Reception antenna module receives electromagnetic wave signal, and is converted into electric signal h (t), described electric signal h (t)
Including useful signal and the self-interference signal for coming from local transmitter；
S2：Log Compression module carries out log-compressed, the signal j (t) after being compressed to electric signal h (t)；To big signal
Amplitude is compressed, to small signal approximation Linear Amplifer；Wherein, the compression function of log-compressed is：
A and B is the constant more than 0 in formula；
S3：Receiving channel carries out obtaining intermediate-freuqncy signal k (t) after down coversion to the signal j (t) after compression, and carries out suitably
Amplification；
S4：ADC sampling intermediate-freuqncy signal k (t) and output digit signals m (n)；
S5：Data signal m (n) is recovered original reception according to the inverse operation of compression module and believed by digital recovery module
Number corresponding data signal x (n), described inverse operation is look-up table mapping：
X (n)=f [m (n)].
Embodiment 2：A kind of application method for the device for improving receiver dynamic range, it comprises the following steps：
S1：Reception antenna module receives electromagnetic wave signal, and is converted into electric signal h (t), described electric signal h (t)
Including useful signal and the self-interference signal for coming from local transmitter；
S2：Log Compression module carries out trigonometric function compression, the signal j (t) after being compressed to electric signal h (t)；To big
Signal amplitude is compressed, to small signal approximation Linear Amplifer；Wherein, compression function is：
S3：Receiving channel carries out obtaining intermediate-freuqncy signal k (t) after down coversion to the signal j (t) after compression, and carries out suitably
Amplification；
S4：ADC sampling intermediate-freuqncy signal k (t) and output digit signals m (n)；
S5：Data signal m (n) is recovered original reception according to the inverse operation of compression module and believed by digital recovery module
Number corresponding data signal x (n), described inverse operation is look-up table mapping：
X (n)=f [m (n)].
Embodiment 3：A kind of application method for the device for improving receiver dynamic range, it comprises the following steps：
S1：Reception antenna module receives electromagnetic wave signal, and is converted into electric signal h (t), described electric signal h (t)
Including useful signal and the self-interference signal for coming from local transmitter；
S2：Log Compression module carries out multinomial compression, the signal j (t) after being compressed to electric signal h (t)；To big letter
Number amplitude is compressed, to small signal approximation Linear Amplifer；Wherein, compression function is：
S3：Receiving channel carries out obtaining intermediate-freuqncy signal k (t) after down coversion to the signal j (t) after compression, and carries out suitably
Amplification；
S4：ADC sampling intermediate-freuqncy signal k (t) and output digit signals m (n)；
S5：Data signal m (n) is recovered original reception according to the inverse operation of compression module and believed by digital recovery module
Number corresponding data signal x (n), described inverse operation is look-up table mapping：
X (n)=f [m (n)].
F () mappings can be obtained by following manner：Emitter launches sawtooth signal, in each sawtooth period,
Signal level is linearly increasing, and signal m (n) that now ADC is sampled are then that it is with the time by signal compressed step S2
Change is no longer linear, then f () mappings can be obtained by the way of Function Fitting with m (n) inputs, repeats enough
Many number of times fit operations will obtain the sufficiently high f () of precision.
Because ADC output sets are only finite aggregate, such as 8 ADC output only has 28=256 kinds, therefore by f
() discrete look-up table that turns to can reduce operand.
Claims (6)
1. it is a kind of improve receiver dynamic range device application method, the device it include reception antenna module, compression mould
Block, receiving channel module, ADC, digital recovery module；Described reception antenna module is connected to compression module, and compression module connects
Receiving channel module is connected to, receiving channel module is connected to ADC, and ADC is connected to digital recovery module；Described numeral recovers mould
Block is used for the inverse operation that module is compressed to obtained signal；Described compression module is compressed to big signal amplitude, right
Small signal approximation Linear Amplifer, reduction receives signal peak-to-average ratio, improves receiver dynamic range, and this method comprises the following steps：
S1：Reception antenna module receives electromagnetic wave signal, and is converted into electric signal h (t), and described electric signal h (t) includes
Useful signal and the self-interference signal for coming from local transmitter；
S2：Log Compression module is compressed to electric signal h (t), the signal j (t) after being compressed；Big signal amplitude is carried out
Compression, to small signal approximation Linear Amplifer；
S3：Receiving channel obtains intermediate-freuqncy signal k (t) after carrying out down coversion to the signal j (t) after compression；
S4：ADC sampling intermediate-freuqncy signal k (t) and output digit signals m (n)；
S5：Digital recovery module recovers data signal m (n) according to the inverse operation of compression module original reception signal pair
The data signal x (n) answered；
It is characterized in that：Inverse operation described in step S5 maps for look-up table, and mapping relations expression formula is：
X (n)=f [m (n)]
Mapped with m (n) for input by the way of Function Fitting, precision foot can be obtained by repeating enough number of times fit operations
Enough high f [m (n)], look-up table is turned to because ADC output sets are only finite aggregate, therefore by f [m (n)] is discrete.
2. a kind of application method of device for improving receiver dynamic range according to claim 1, it is characterised in that：Institute
The inverse operation stated maps for look-up table.
3. a kind of application method of device for improving receiver dynamic range according to claim 1, it is characterised in that：Institute
The compression module stated is using log-compressed, trigonometric function compression or multinomial compression.
4. a kind of application method of device for improving receiver dynamic range according to claim 1, it is characterised in that：Step
Boil down to log-compressed described in rapid S2, the compression function of log-compressed is：
A and B is the constant more than 0 in formula.
5. a kind of application method of device for improving receiver dynamic range according to claim 1, it is characterised in that：Step
Boil down to trigonometric function described in rapid S2 compresses, and the compression function of trigonometric function compression is：
6. a kind of application method of device for improving receiver dynamic range according to claim 1, it is characterised in that：Step
Boil down to multinomial described in rapid S2 compresses, and polynomial compression function is：
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| CN114826301B (en) * | 2022-06-29 | 2022-10-21 | 天津七一二通信广播股份有限公司 | Wide-band receiving equipment and receiving method with large dynamic range |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107970A (en) * | 2013-01-18 | 2013-05-15 | 电子科技大学 | Communication system based on compressed sensing |
| CN204131506U (en) * | 2014-09-19 | 2015-01-28 | 成都振芯科技股份有限公司 | A kind of High Linear radio frequency reception treatment circuit |
| CN104518808A (en) * | 2013-09-29 | 2015-04-15 | 华为技术有限公司 | Equipment and method for eliminating self-interference signals |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8081946B2 (en) * | 2008-12-23 | 2011-12-20 | L-3 Communications Integrated Systems L.P. | Interference cancellation for reconfigurable direct RF bandpass sampling interference cancellation |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107970A (en) * | 2013-01-18 | 2013-05-15 | 电子科技大学 | Communication system based on compressed sensing |
| CN104518808A (en) * | 2013-09-29 | 2015-04-15 | 华为技术有限公司 | Equipment and method for eliminating self-interference signals |
| CN204131506U (en) * | 2014-09-19 | 2015-01-28 | 成都振芯科技股份有限公司 | A kind of High Linear radio frequency reception treatment circuit |
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