CN101252564B - Code quadrature transmitting reference modem system in ultra-wideband communication - Google Patents

Abstract

The invention relates to an orthogonal code transmission reference modulation and demodulation system for ultra-wideband communications and the application method thereof, which can effectively overcome the problem that currently transmission reference pulse ultra-wideband system of the orthogonal code obviously deteriorates along with multi-path time delay or the increasing of transmission speed. The system comprises a transmitter and a receiver, and the application method is that: the micro-controller of the transmitter converts and conducts quadrature of 1 to the code after receiving the data, and then outputs triggering sequence signals which pass through an amplifier and are then sent out through an antenna; The receiver, after receiving the signals, sends the signals to a four-phase multiplier through a low-pass filter, an ultra-wideband amplifier, a capacitor and a power-divider; the integration window of the micro-controller of the receiver controls an integrator whose output signals are transmitted to the sampling module of the micro-controller by the micro-controller; the signals are sent to a judgment module after being sampled and at last demodulation data are outputted. The modulation and demodulation system effectively suits the high requirements of difficult channel estimation, high standard of synchronization in UWB channels, and is good for miniaturization and integration.

Description

Code quadrature transmitting reference modem system in the ultra-wideband communications

One, technical field

The present invention relates to the telecommunication field, code quadrature transmitting reference modem system and application process in particularly a kind of pulse ultra-broad band communication.

Two, background technology

The sixties in 20th century, the super-broadband tech of Modern Significance appears in the research in tactical communication field of U.S. army.As the technology of the exclusive use of US military, the UWB technology has outstanding advantages such as strong anti-interference ability, low-power consumption, miniaturization and precision distance measurement, is therefore monopolized by US military for a long time.Have broad application prospects equally at civil area in view of the UWB technology, 2002, along with FCC confirms UWB radiation template, indicate that US military formally lifts a ban it, allow the UWB commercial signal communication system to come into operation.

At present, the research of external The Technology of Ultra mainly concentrates on civilian and military two fields.Wherein the research of civil area mainly concentrates on aspects such as short distance (in 10 meters), two-forty (hundreds of Mbit/s and even last Gbit/s) wireless transmission.Different with the research of civil aspect is; The military applications field is more extensive, mainly launches round aspects such as military sensor network communication, high anti-interference tactics networking radio station, non line of sight UWB radio station, asymmetric high speed UWB radio station, UWB detection radar, naval vessel and aircraft intercommunication system and high accuracy battlefield range positioning systems to study.

Because the restriction of high speed analog-digital conversion (A/D) switching device, often adopt the relevant method of simulation to realize detection to the UWB signal based on traditional UWB system receiver of pulse system.But the receiver of this structure exists deficiencies such as length lock in time, structure relative complex and channel estimating difficulty, and therefore the application at wireless sensor network is restricted.Synchronous fast, simple in structure and possess the application requirements of many speed, multiple access ability to wireless sensor network, external correlative study unit has proposed based on sending with reference to (TR, Transmitted-Reference) the pulse ultra-broad band system of thought.

The Ralph Hoctor of the U.S. and Harold Tomlinson have proposed standard and have sent reference pulse ultra broadband system (TR-UWB, Transmitted-Reference Ultra-Wideband).Simultaneously, this research group has provided the practicability scheme based on the transmission reference type impulse radio ultra wide band system (DHTR, Delay-HoppedTransmitted-Reference Ultra-Wideband) of jumping time-delay.This scheme has possessed sends the advantage with reference to system, but because the coaxial line that has adopted suitable length as the simulation time delay device, therefore exists the difficulty of integrated and further miniaturization.Subsequently, the foreign study personnel have proposed a series of improved structures to standard TR-UWB system in succession, and the lifting of its performance often is based upon on the basis of adopting more simulation time delay device, thereby make miniaturization and integrated design more difficult.Therefore, this transmission reference type impulse radio ultra wide band system scheme based on time-delay can not satisfy the miniaturization requirement of sensor node well.

To sending deficiency with reference to system based on time-delay; The Dennis Goeckel of the U.S. and Qu Zhang have proposed transmission reference pulse ultra broadband (FSR-UWB, the SlightlyFrequency-Shifted Reference Ultra-Wideband) system based on frequency deviation.Simultaneously; This research group has provided the physics realization scheme, and this scheme need not adopt the simulation time delay device, thereby helps integrated design; But because its performance is relevant with multipath expansion time delay; Therefore along with the raising of transmission range or transmission rate, its performance rapid deterioration, so its transmission rate can't further promote.

Three, summary of the invention

To above-mentioned situation; The present invention's purpose just provides code quadrature transmitting reference modem system and application process in a kind of pulse ultra-broad band communication; The transmission reference pulse radio ultra wide band system that can effectively overcome the prior art orthogonal code obviously worsens along with the increase of multidiameter delay or transmission rate; Thereby both solved in the UWB channel channel estimating difficulty effectively, had relatively high expectations synchronously; And implementation structure simplification again, miniaturization and integrated problem; The technical scheme of its solution is, is that a kind of yard territory is with reference to system based on transmission frame of reference (COTR-UWB, Code-Orthogonalized Transmitted-ReferenceUltra-Wideband) the scheme essence of orthogonal code reference.In a code-element period, the pulse of reference signal and the pulse of data-signal overlap in time.The key of this scheme is: the orthogonal code signal identical with code-element period with one-period multiplies each other with the interior data-signal of each code-element period; Guaranteed reference signal and the data-signal orthogonality in a code-element period; In view of the above; Technical scheme of the present invention is, this system is made up of transmitter and receiver, and transmitter is by microcontroller IC ₁Output and ultra wideband narrow-pulse generator input link, the output of ultra wideband narrow-pulse generator is through capacitor C ₁Input with the ultra broadband emission amplifier links to each other, and the output of ultra broadband emission amplifier links to each other with the ultra broadband transmitting antenna;

Receiver is by microcontroller IC ₂, integrator, the two or four phase multiplier, the one or four phase multiplier, power splitter, capacitor C ₂, ultra broadband reception amplifier, low pass filter, ultra broadband reception antenna constitute the output termination microcontroller IC of integrator ₂Input; The input of integrator joins with the output of the two or four phase multiplier; The input of the two or four phase multiplier joins with the output of the one or four phase multiplier, and the input of the one or four phase multiplier joins with the output of power splitter, and the input of power splitter is through capacitor C ₂Output with the ultra broadband reception amplifier links to each other, and the input of ultra broadband reception amplifier links to each other with the output of low pass filter, is connected to the ultra broadband reception antenna on the input of low pass filter, microcontroller IC ₂Output termination the two or the four phase multiplier of interior orthogonal code waveform generation module, microcontroller IC ₂The output of interior integration window control module joins with integrator.

Application process of the present invention is the microcontroller IC of transmitter ₁After receiving data through input, data are delivered to the code conversion module, data are carried out repeated encoding and reversal, the data of output are delivered to multiplier module;

It is identical and deliver to multiplier module with complete " 1 " yard mutually orthogonal orthogonal code that the orthogonal code generation module produces the length of a code length and repeated encoding;

Data and orthogonal code that multiplier module is brought the code conversion module multiply each other, and the data of output are delivered to and added " 1 " module;

Adding data that " 1 " module brings multiplier module adds after " 1 " computing through microcontroller IC ₁Output output triggers sequence, produces the ultra wideband narrow-pulse string in order to trigger the ultra wideband narrow-pulse generator;

The burst pulse string that the ultra wideband narrow-pulse generator produces is through partiting dc capacitor C ₁Get into the ultra broadband emission amplifier;

The ultra broadband emission amplifier is delivered to the ultra broadband transmitting antenna after the burst pulse string is amplified, and by the ultra broadband transmitting antenna emission of radio frequency signals is gone out;

After the ultra broadband reception antenna of receiver receives radiofrequency signal, deliver to low pass filter filtering, deliver to the ultra broadband reception amplifier through filtered signal, the ultra broadband reception amplifier amplifies back output with signal;

The signal of ultra broadband reception amplifier output is through partiting dc capacitor C ₂Be sent to power splitter, also be sent to the one or four phase multiplier simultaneously carries out multiplying to power splitter output two same signals;

Microcontroller IC ₂Comprise orthogonal code waveform generation module, integration window control module, sampling module and judging module, microcontroller IC ₂Inner orthogonal code waveform generation module produces the orthogonal code waveform signal, through microcontroller IC ₂Output in the two or the four phase multiplier, the pairing orthogonal code of orthogonal code waveform signal that the orthogonal code waveform generation module produces and the orthogonal code of transmitting terminal are synchronous;

The signal that integrator is sent here the two or four phase multiplier carries out integration, simultaneously, and microcontroller IC ₂Inner integration window control module is through microcontroller IC ₂The integration window of output signal controlling integrator;

The output signal of integrator is through microcontroller IC ₂Outputed to microcontroller IC ₂Inner sampling module, sampling module to signal sampling after, sampled value is delivered to judging module;

Judging module is adjudicated the back through microcontroller IC to sampled value ₂Demodulated output data, thus realize the object of the invention.

In a word, provided by above-mentioned situation, technical scheme of the present invention is: be made up of transmitter and receiver, said transmitter is by microcontroller IC ₁Output and ultra wideband narrow-pulse generator 6 inputs link, the output of ultra wideband narrow-pulse generator 6 is through capacitor C ₁Input with ultra broadband emission amplifier 8 links to each other, and the output of ultra broadband emission amplifier 8 links to each other with ultra broadband transmitting antenna 9; Receiver is the output termination microcontroller IC of integrator 17 ₂Input; The input of integrator 17 joins with the output of the two or four phase multiplier 16; The input of the two or four phase multiplier 16 joins with the output of the one or four phase multiplier 15; The input of the one or four phase multiplier 15 joins with the output of power splitter 14, and the input of power splitter 14 is through capacitor C ₂Connect the output of ultra broadband reception amplifier 12, the input of ultra broadband reception amplifier 12 links to each other with the output of low pass filter 11, is connected to ultra broadband reception antenna 10 on the input of low pass filter 11; Microcontroller IC ₁Comprise orthogonal code generation module, code conversion module, multiplier module and add ' 1 ' module, microcontroller IC ₁After receiving data through input, data are delivered to the code conversion module, data are carried out repeated encoding and reversal, the data of output are delivered to multiplier module; It is identical and deliver to multiplier module with ' 1 ' yard mutually orthogonal orthogonal code entirely that the orthogonal code generation module produces the length of a code length and repeated encoding; Data and orthogonal code that multiplier module is brought the code conversion module multiply each other, and the data of output are delivered to and added ' 1 ' module; Adding data that ' 1 ' module brings multiplier module adds after ' 1 ' computing through microcontroller IC ₁Output output triggers sequence, produces the ultra wideband narrow-pulse string in order to trigger the ultra wideband narrow-pulse generator; Microcontroller IC ₂Comprise orthogonal code waveform generation module, integration window control module, sampling module and judging module, microcontroller IC ₂Inner orthogonal code waveform generation module produces the orthogonal code waveform signal, through microcontroller IC ₂Output to the two or four phase multiplier, the pairing orthogonal code of waveform signal of the orthogonal code that the orthogonal code waveform generation module produces and the orthogonal code of transmitting terminal are synchronous; Microcontroller IC ₂Inner integration window control module is through microcontroller IC ₂The integration window of control integrator; The output signal of integrator is through microcontroller IC ₂Outputed to microcontroller IC ₂Inner sampling module, sampling module to signal sampling after, sampled value is delivered to judging module; After judging module is adjudicated sampled value, through microcontroller IC ₂Demodulated output data; Also be sent to the one or four phase multiplier simultaneously carries out multiplying to power splitter output two same signals.

System configuration of the present invention is simple, and is low in energy consumption, compares with transmission reference type system based on frequency deviation; This system not only performance is dominant; Structure is further simplified, and performance can obviously not worsen along with the increase of multidiameter delay or transmission rate, and the transmission rate or the transmission range that therefore are suitable for are improved; The requirement that the present invention (COTR-UWB) system not only can solve in UWB channel channel estimating difficulty effectively, have relatively high expectations synchronously, and help the miniaturization of system and integrated.

Four, description of drawings

Fig. 1 is a transmitter-receiver structure chart of the present invention.

Fig. 2 is the transmitter principle figure of system of the present invention.

Fig. 3 is the receiver principle figure of system of the present invention.

Fig. 4 is system TR-UWB of the present invention, FSR-UWB and COTR-UWB systematic function analogous diagram (1).

Fig. 5 is system TR-UWB of the present invention, FSR-UWB and COTR-UWB systematic function analogous diagram (2).

Five, embodiment

Elaborate below in conjunction with the accompanying drawing specific embodiments of the invention.

Provided by Fig. 1, system of the present invention is made up of transmitter and receiver, and transmitter is by microcontroller IC ₁1 output and ultra wideband narrow-pulse generator 6 inputs link, and the output of ultra wideband narrow-pulse generator 6 is through capacitor C ₁7 inputs with ultra broadband emission amplifier 8 link to each other, and the output of ultra broadband emission amplifier 8 links to each other with ultra broadband transmitting antenna 9;

Receiver is by microcontroller IC ₂22, integrator the 17, the 24 phase multiplier the 16, the 1 phase multiplier 15, power splitter 14, capacitor C ₂13, ultra broadband reception amplifier 12, low pass filter 11, ultra broadband reception antenna 10 constitute the output termination microcontroller IC of integrator 17 ₂22 input; The input of integrator 17 joins with the output of the two or four phase multiplier 16; The input of the two or four phase multiplier 16 joins with the output of the one or four phase multiplier 15; The input of the one or four phase multiplier 15 joins with the output of power splitter 14, and the input of power splitter 14 is through capacitor C ₂13 connect the output of ultra broadband reception amplifier 12, and the input of ultra broadband reception amplifier 12 links to each other with the output of low pass filter 11, is connected to ultra broadband reception antenna 10 on the input of low pass filter 11.

Said microcontroller IC ₁, IC ₂Be PIC18F1320, wherein microcontroller IC ₁Comprise orthogonal code generation module 4, code conversion module 2, multiplier module 3 and add " 1 " module 5; Orthogonal code generation module 4 links to each other with multiplier module 3; Code conversion module 2 links to each other with multiplier module 3; Multiplier module 3 outputs link to each other with adding " 1 " module 5 inputs, and it is continuous with the input of ultra wideband narrow-pulse generator 6 to add " 1 " module 5 outputs;

Microcontroller IC ₂In be equipped with orthogonal code waveform generation module 18, integration window control module 19, sampling module 20 and judging module 21; Orthogonal code waveform generation module 18 is joined with the two or four phase multiplier 16; Integration window control module 19 is joined with integrator 17; Sampling module 20 joins with integrator 17 outputs, and the output of sampling module 20 connects judging module 21;

Above-mentioned each device is the commercially available prod, and wherein alleged module is the signal digital (software coding program) that programs.

The method for using of system of the present invention is microcontroller IC ₁After receiving data through input, data are delivered to code conversion module 2, data are carried out repeated encoding and reversal, the data of output are delivered to multiplier module 3;

It is identical and deliver to multiplier module 3 with complete " 1 " yard mutually orthogonal orthogonal code that orthogonal code generation module 4 produces the length of a code length and repeated encoding;

Data and orthogonal code that multiplier module 3 is brought code conversion module 2 multiply each other, and the data of output are delivered to and added " 1 " module 5;

Adding data that 5 pairs of multiplier modules 3 of " 1 " module bring adds after " 1 " computing through microcontroller IC ₁Output output triggers sequence, produces the ultra wideband narrow-pulse string in order to trigger ultra wideband narrow-pulse generator 6;

The burst pulse string that ultra wideband narrow-pulse generator 6 produces is through partiting dc capacitor C ₁7 get into ultra broadband emission amplifier 8;

Ultra broadband emission amplifier 8 is delivered to ultra broadband transmitting antenna 9 after the burst pulse string is amplified, and by ultra broadband transmitting antenna 9 emission of radio frequency signals is gone out;

After the ultra broadband reception antenna 10 of receiver receives radiofrequency signal, deliver to low pass filter 11 filtering, deliver to ultra broadband reception amplifier 12 through filtered signal, ultra broadband reception amplifier 12 amplifies back output with signal;

The signal of ultra broadband reception amplifier 12 outputs is through partiting dc capacitor C ₂13 are sent to power splitter 14, and also be sent to the one or four phase multiplier 15 simultaneously carries out multiplying to power splitter 14 output two same signals;

Microcontroller IC ₂Comprise orthogonal code waveform generation module, integration window control module, sampling module and judging module, microcontroller IC ₂Inner orthogonal code waveform generation module 18 produces the orthogonal code waveform signal, through microcontroller IC ₂22 output in the two or the four phase multiplier 16, and the pairing orthogonal code of orthogonal code waveform signal that orthogonal code waveform generation module 18 produces and the orthogonal code of transmitting terminal are synchronous;

The signal that 17 pairs the two or four phase multipliers 16 of integrator are sent here carries out integration, simultaneously, and microcontroller IC ₂Inner integration window control module 19 is through microcontroller IC ₂The integration window of 22 control integrators 17;

The output signal of integrator 17 is through microcontroller IC ₂22 are outputed to microcontroller IC ₂ Inner sampling module 20 behind 20 pairs of signal samplings of sampling module, is delivered to judging module 21 with sampled value;

After 21 pairs of sampled values of judging module are adjudicated, through microcontroller IC ₂22 demodulated output datas;

Said complete " 1 " sign indicating number is meant one section continuous numeral, and each number average is " 1 " in this piece of digital, and the digital number in this piece of digital is a code length, and general length gets 2 ⁿ, n is a positive integer, one is long is 2 ⁿThe sign indicating number of number and complete " 1 " sign indicating number quadrature between relation must satisfy and be 0, long to be 2 sign indicating number 2 powers and complete " 1 " sign indicating number quadrature be (1-1,1-1) and " 1 " yard quadrature, i.e. 1 * 1+1 * (1)+1 * 1+1 * (1)=0 entirely as one;

Add " 1 " module 5 and be meant that the numeral to all these modules of entering all adds 1 module;

The present invention verifies through Mathematical Modeling, success fully, and relevant situation is following:

If the code-element period of COTR-UWB system is T _s, the frame period is T _f, comprise a UWB pulse in per frame period, and T arranged _s=N _fT _f, and N _f＞＞1, N _fIt is the frame number in each symbol.E _sIt is transmission of power in the code-element period.b _l{ 1 ,+1} is an information transmitted bit in l the code-element period to ∈.P () is the UWB pulse of standard, and its energy is 1/N _f, bandwidth is approximately W, the duration be [0, T _p], and T _p＜＜T _fL is the code element number in the signal that once transmits.D (t) is the orthogonal code waveform that the data branch road is adopted, and the cycle is T _s

Define one by N _fThe signal u (t) that individual unmodulated UWB pulse is formed is as follows:

$u\left(t\right)=\underset{n=0}{\overset{N_f-1}{\mathrm{\Σ}}}p(t-{\mathrm{nT}}_f)---\left(1\right)$

Then at the time interval [lT _s, (l+1) T _s] in (that is: code-element period), signal s (t) can be expressed as:

s(t)＝g _l(t-lT _s)u(t-lT _s) (2)

Wherein:

$g_l\left(t\right)=\sqrt{\frac{{\mathrm{<figure-callout\; id="2"\; label="E\; s"\; filenames="S2008100494472E00011.png,S2008100494472E00012.png"\; state="\{\{state\}\}">E</figure-callout>}}_s}{2}}+\sqrt{\frac{E_s}{2}}{b}_{l}d\left(t\right)---\left(3\right)$

So, in the COTR-UWB system, the representation of transmission signals is:

$x\left(t\right)=\underset{l=0}{\overset{L}{\mathrm{\&Sigma;}}}\underset{k=0}{\overset{N_f-1}{\mathrm{\&Sigma;}}}(\sqrt{\frac{E_s}{2}}p(t-{\mathrm{lT}}_s-{\mathrm{kT}}_f)+b_l\sqrt{\frac{E_s}{2}}p(t-{\mathrm{lT}}_s-{\mathrm{kT}}_f)d\left(t\right))---\left(4\right)$

The error rate of COTR-UWB system under additive white Gaussian noise (AWGN) and multipath fading (MP) condition is respectively:

$P_{\mathrm{COTR}-\mathrm{UWB},\mathrm{AWGN}}=Q\left(\frac{E_S}{\sqrt{{2\mathrm{<figure-callout\; id="0"\; label="E\; S\; N"\; filenames="S2008100494472E00021.png,S2008100494472E00022.png"\; state="\{\{state\}\}">E</figure-callout>}}_S{N}_{}{}_0+{\mathrm{<figure-callout\; id="0"\; label="T\; S\; N"\; filenames="S2008100494472E00021.png,S2008100494472E00022.png"\; state="\{\{state\}\}">T</figure-callout>}}_S{N_{}}^{}{{}_0}^{2}W}}\right)---\left(5\right)$

$P_{\mathrm{COTR}-\mathrm{UWB},\mathrm{MP}}=E_{\underset{\&OverBar;}{h}}\left\{Q\left(\frac{E_S\underset{l=0}{\overset{L-1}{\mathrm{\&Sigma;}}}{{\mathrm{\&alpha;}}_{\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="S2008100494472E00011.png,S2008100494472E00012.png"\; state="\{\{state\}\}">l</figure-callout>}}}^2}{\sqrt{{2\mathrm{<figure-callout\; id="0"\; label="E\; S\; N"\; filenames="S2008100494472E00021.png,S2008100494472E00022.png"\; state="\{\{state\}\}">E</figure-callout>}}_S{N}_{}{}_0\underset{l=0}{\overset{L-1}{\mathrm{\&Sigma;}}}{{\mathrm{\&alpha;}}_{\mathrm{<figure-callout\; id="2"\; label="l"\; filenames="S2008100494472E00011.png,S2008100494472E00012.png"\; state="\{\{state\}\}">l</figure-callout>}}}^2+{\mathrm{<figure-callout\; id="0"\; label="T\; S\; N"\; filenames="S2008100494472E00021.png,S2008100494472E00022.png"\; state="\{\{state\}\}">T</figure-callout>}}_S{N_{}}^{}{{}_0}^{2}W}}\right)\right\}---\left(6\right)$

The transmitter principle of COTR-UWB system (being system of the present invention, as follows) is as shown in Figure 2,1 is pulse generator among Fig. 3 wherein, and 2,3 is multiplier, and 4 is adder.

The receiver principle of COTR-UWB system is as shown in Figure 4, (1) low pass filter among Fig. 3 wherein, and (2) are squarer (i.e. the one or four phase multiplier), and (3) are multiplier, and (4) are integrator, and (5) are decision device.

The present invention (COTR-UWB) systematic function:

Utilize communication simulation software (matlab 7.0), under IEEE 802.15.4a office NLOS channel model, carried out performance of BER emulation, and combined standard TR-UWB system and FSR-UWB system compare to the COTR-UWB system.

Concrete simulated conditions is that character rate is R _b=1/T _s=1Mbit/s, symbol period are T _s=1000ns, the frame period is T _f, the pulse p () that pulse generator produces is that width is the second order Gauss waveform of 1ns, the duration is T _p=1ns, the noise bandwidth of receiving terminal is 2.5GHz (monolateral).Concrete simulation result is following:

Selecting the frame period of TR-UWB system signal is T _f=32.25ns, the intraframe data pulsion phase is T for the time-delay of reference pulse _D=13.5ns, the frame period of FSR-UWB and COTR-UWB system signal is 1/2 of the TR-UWB system signal frame period, simulation result is as shown in Figure 4.

Select the frame period T of TR-UWB system signal _fData pulse in the=62.5ns, frame is T with respect to the time-delay of reference pulse _D=30ns, the frame period of FSR-UWB and COTR-UWB two system signals is 1/2 of TR-UWB system signal frame periods, then simulation result is as shown in Figure 5.

The present invention (COTR-UWB) system is that short distance, low-rate data transmission are used a kind of simple in structure, solution that power consumption is lower is provided.Have following outstanding advantage:

(1) extremely low spectral density is arranged;

(2) low intercepting and capturing detection probability is arranged;

(3) strong antijamming capability and penetration capacity are arranged, improved communication reliability;

(4) power consumption is extremely low, has prolonged the work timing of system;

(5) simple in structure, help miniaturization Design;

(6) compare with the pulse UWB system that adopts non-transmission with reference to system, lock in time is short, does not need channel estimating;

(7) with based on the transmission reference pulse UWB system that delays time compare, need not simulate time delay device, help integrated design, can further reduce the volume and the cost of system;

(8) compare with transmission reference pulse UWB system based on frequency deviation, performance can obviously not worsen along with the increase of multidiameter delay or transmission rate, and the transmission rate and the transmission range that are suitable for further improve.

Claims (4)

1. code quadrature transmitting reference modem system in the ultra-wideband communications is made up of transmitter and receiver, it is characterized in that said transmitter is by microcontroller IC ₁Output and ultra wideband narrow-pulse generator (6) input link, the output of ultra wideband narrow-pulse generator (6) is through capacitor C ₁Input with ultra broadband emission amplifier (8) links to each other, and the output of ultra broadband emission amplifier (8) links to each other with ultra broadband transmitting antenna (9); Receiver is the output termination microcontroller IC of integrator (17) ₂Input; The input of integrator (17) joins with the output of the two or four phase multiplier (16); The input of the two or four phase multiplier (16) joins with the output of the one or four phase multiplier (15); The output of the same power splitter of input (14) of the one or four phase multiplier (15) joins, and the input of power splitter (14) is through capacitor C ₂Connect the output of ultra broadband reception amplifier (12), the output of the same low pass filter of input (11) of ultra broadband reception amplifier (12) links to each other, and is connected to ultra broadband reception antenna (10) on the input of low pass filter (11); Microcontroller IC ₁Comprise orthogonal code generation module, code conversion module, multiplier module and add " 1 " module, microcontroller IC ₁After receiving data through input, data are delivered to the code conversion module, data are carried out repeated encoding and reversal, the data of output are delivered to multiplier module; It is identical and deliver to multiplier module with complete " 1 " yard mutually orthogonal orthogonal code that the orthogonal code generation module produces the length of a code length and repeated encoding; Data and orthogonal code that multiplier module is brought the code conversion module multiply each other, and the data of output are delivered to and added " 1 " module; Adding data that " 1 " module brings multiplier module adds after " 1 " computing through microcontroller IC ₁Output output triggers sequence, produces the ultra wideband narrow-pulse string in order to trigger the ultra wideband narrow-pulse generator; Microcontroller IC ₂Comprise orthogonal code waveform generation module, integration window control module, sampling module and judging module, microcontroller IC ₂Inner orthogonal code waveform generation module produces the orthogonal code waveform signal, through microcontroller IC ₂Output to the two or four phase multiplier, the pairing orthogonal code of waveform signal of the orthogonal code that the orthogonal code waveform generation module produces and the orthogonal code of transmitting terminal are synchronous; Microcontroller IC ₂Inner integration window control module is through microcontroller IC ₂The integration window of control integrator; The output signal of integrator is through microcontroller IC ₂Outputed to microcontroller IC ₂Inner sampling module, sampling module to signal sampling after, sampled value is delivered to judging module; After judging module is adjudicated sampled value, through microcontroller IC ₂Demodulated output data; Also be sent to the one or four phase multiplier simultaneously carries out multiplying to power splitter output two same signals.

2. code quadrature transmitting reference modem system in the described ultra-wideband communications of claim 1 is characterized in that, said microcontroller IC ₁Comprise orthogonal code generation module (4), code conversion module (2), multiplier module (3) and add " 1 " module (5); The same multiplier module of orthogonal code generation module (4) (3) links to each other; The same multiplier module of code conversion module (2) (3) links to each other; Multiplier module (3) output links to each other with adding " 1 " module (5) input, and it is continuous with the input of ultra wideband narrow-pulse generator (6) to add " 1 " module (5) output; Microcontroller IC ₂Comprise orthogonal code waveform generation module (18), integration window control module (19), sampling module (20) and judging module (21); Orthogonal code waveform generation module (18) is joined with the two or four phase multiplier (16); The same integrator of integration window control module (19) (17) joins; The same integrator of sampling module (20) (17) output joins, and the output of sampling module (20) connects judging module (21).

3. code quadrature transmitting reference modem system in claim 1 or the 2 described ultra-wideband communications is characterized in that, the burst pulse string that said ultra wideband narrow-pulse generator (6) produces is through partiting dc capacitor C ₁Get into ultra broadband emission amplifier (8);

Ultra broadband emission amplifier (8) is delivered to ultra broadband transmitting antenna (9) after the burst pulse string is amplified, and by ultra broadband transmitting antenna (9) emission of radio frequency signals is gone out;

After the ultra broadband reception antenna (10) of receiver receives radiofrequency signal, deliver to low pass filter (11) filtering, deliver to ultra broadband reception amplifier (12) through filtered signal, ultra broadband reception amplifier (12) amplifies back output with signal;

The signal of ultra broadband reception amplifier (12) output is through partiting dc capacitor C ₂Be sent to power splitter (14);

The signal that integrator (17) is sent here the two or four phase multiplier (16) carries out integration.

4. code quadrature transmitting reference modem system in the ultra-wideband communications according to claim 3; It is characterized in that said complete " 1 " sign indicating number is meant one section continuous numeral, each number average is " 1 " in this piece of digital; Digital number in this piece of digital is a code length, and length gets 2 ⁿ, n is a positive integer, one is long is 2 ⁿNumber and complete " 1 " sign indicating number quadrature product and be 0.

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