CN104022990B - A kind of distributed beams based on sea wireless sense network form carrier phase synchronization method - Google Patents

Abstract

A kind of distributed beams based on sea wireless sense network form carrier phase synchronization method, belong to wireless sense network, distributed beams and form technical field.The present invention comes and goes the carrier synchronization method autgmentability not slow problem of Phase synchronization between strong and node to solve existing time slot, the problem of satellite can not be in time reached also for the smaller caused distribution light beam of single sensor power, also for the Doppler effect that signals transmission between suppression node occurs.Destination node sends single-frequency beacon signal to primary node and secondary node, and host node obtains host node modulated signal after being processed through phase identification of circuit；The single-frequency beacon signal that will first be received from node is sent to host node, is then forwarded to from node after being processed through host node, so as to be formed from node modulated signal；Host node modulated signal and from node modulated signal at destination node in-phase stacking, obtain power gain.The present disclosure additionally applies for radio sensing network.

Description

A kind of distributed beams based on sea wireless sense network form carrier phase synchronization Method

Technical field

Technical field is formed the invention belongs to wireless sense network, distributed beams.

Background technology

Ocean be the mankind survive procreation and social realization sustainable development important base, exploitation ocean, development sea Foreign economy is the only way of whole human survival and social development, in view of the importance of ocean, to oceanic resources and environment Monitoring is just turning into a big focus of countries in the world research.Marine information is generally transmitted using satellite as relaying, ocean with Land is different, big base station cannot be set up on sea and is communicated with satellite, while base station also cannot carry out random cloth on sea Spread.And sensor node can at random be dispensed due to its low cost and small size on sea, but single sensor node Energy it is smaller, it is impossible to directly communicated with satellite, thus need to utilize sea multisensor node distribution (collaboration) ripple Beam forms long-distance transmissions technology and realizes sensor network and satellite direct communication, and carries out the core of this distributed beams formation Problem is the synchronization of carrier phase, time.

The existing carrier phase synchronization scheme formed suitable for distributed beams mainly has two kinds：One of them is The Scalable Feedback Control for Distributed Beamforming in that R.Mudumbai et al. is proposed Sensor Networks (distributed beams form expansible feedback in sensor network).This method needs Destination node is proofreaded judgement to the phase information of source node for several times, and a kind of optimal result of final choice carries out wave beam shape Into.Because this check and correction needs are carried out many times, that is, destination node needs frequently to be communicated with source node, so only Suitable for using aircraft or terrestrial base station as the situation of the short distance Wave beam forming of relaying, not being suitable for sea sensor straight with satellite Tap into the situation of row communication.

Another kind is the Time-Slotted Round-Trip Carrier that D.Richard Brown et al. are proposed Synchronization (time slot comes and goes carrier synchronization).Be sent to for phase information first by destination node all by this method Time-division slot carries out phase-accumulated so as to obtain the Phase synchronization between node between source node, source node.Its advantage is in source node in not Needs frequently enter line phase check and correction with destination node, but due to using linear structure between source node, its autgmentability is not By force.In the radio sensing network of sea, single sensor power is smaller, and the distributed beams of its output can not reach satellite, because This needs substantial amounts of sensor node to ensure the rapidity of satellite communication, and this is based on sea wireless sense network and suddenly treats Where the problem of solution.

The content of the invention

The present invention comes and goes carrier synchronization method to solve existing time slot and directly enters with satellite being applied to sea sensor The source node occurred during row communication causes the method autgmentability using linear structure, and Phase synchronization is not asked slowly by force and between node Topic, also for solves the problems, such as single sensor power it is smaller caused by distributed light beam can not reach satellite, also for Suppress what is occurred due to signals transmission between node caused by sensor network nodes irregular movement caused by the fluctuation of sea Doppler effect, it is proposed that a kind of distributed beams based on sea wireless sense network form carrier phase synchronization method.

A kind of distributed beams based on sea wireless sense network form carrier phase synchronization method, and this method is not examine Carried out under conditions of worry frequency and phase estimation error, the method comprises the following steps：

Step one, source node Node_iObtain and data storage copies signal m (t), source node Node_iMiddle Node₁Based on save Point, Node_KBe from node, wherein, K is the positive integer more than or equal to 2；I is the positive integer more than or equal to 1；K∈i；

Step 2, destination node D are to source node Node_iSend single-frequency beacon signal x₀(t)；Source node Node_iReceive described Single-frequency beacon signal x₀(t), and form source node reception signal y_0i(t)；

Source node receives signal y_0iY in (t)₀₁T () represents that host node receives signal, y_0KT () represents to be received from node and believes Number；

Step 3, host node Node₁Signal y is received to host node₀₁T () carries out signal transacting and obtains host node carrier signal x₁₀(t), from node Node_KTo receiving signal y from node_0KT () carries out signal transacting and obtains from node carrier signal x_K0(t)；

Step 4, host node Node₁Data copy signal m (t) is carried in host node carrier signal x₁₀On (t) To host node modulated signal s₁(t)；From node Node_KData copy signal m (t) is carried in from node carrier signal x_K0 Obtained on (t) from node modulated signal s_K(t)；

Step 5, host node Node₁By the host node modulated signal s₁T () is sent to destination node D；From node Node_K Will be described from node modulated signal s_KT () is sent to destination node D；

The host node modulated signal s that step 6, destination node D will be received₁(t) and from node modulated signal s_KT () is superimposed Obtain destination node modulated signal S (t).

The present disclosure additionally applies for radio sensing network.

Beneficial effects of the present invention：The present invention forms environment using distributed beams, and basic thought is to utilize two-way approach On reciprocity property, by signal node conjugation treatment realizing route accumulate phase delay reversion so that two-way approach The phase delay of upper generation is offseted, and so as to realize distributed beams carrier signal phase synchronization, and ripple is formed at destination node Beam.Source node uses main-slave structure mode in the present invention, host node treatment is concentrated through from the phase information of node, afterwards Feed back to from node, referred to as from node transmission signal, produce phase delay to offset reversion on two-way reciprocal path, realize The phase alignment of signal on carrier frequency point so that each node transmission signal reaches Phase synchronization at target, and realize folded Plus so as to produce beam gain, scalability is strong and distributed light beam reaches satellite, and this method restrained effectively due to sea The Doppler effect that signals transmission occurs between node caused by sensor network nodes irregular movement caused by fluctuation.

Brief description of the drawings

Fig. 1 is schematic diagram of the invention；

Fig. 2 is method of the present invention FB(flow block)；

Fig. 3 is phase identification of circuit figure；

Fig. 4 is the graph of a relation of power efficiency and phase error in specific embodiment nine；

Fig. 5 is that power efficiency changes with time figure in specific embodiment nine；

Fig. 6 is that efficiency fiducial probability changes with time figure in specific embodiment nine.

Specific embodiment

Specific embodiment one, present embodiment is illustrated referring to Figures 1 and 2, a kind of base described in present embodiment Carrier phase synchronization method is formed in the distributed beams of sea wireless sense network, this method is not consider that frequency and phase estimate Carried out under conditions of meter error, the method comprises the following steps：

Step one, source node Node_iObtain and data storage copies signal m (t), source node Node_iMiddle Node₁Based on save Point, Node_KBe from node, wherein, K is the positive integer more than or equal to 2；I is the positive integer more than or equal to 1；K∈i；

Step 2, destination node D are to source node Node_iSend single-frequency beacon signal x₀(t)；Source node Node_iReceive described Single-frequency beacon signal x₀(t), and form source node reception signal y_0i(t)；

Source node receives signal y_0iY in (t)₀₁T () represents that host node receives signal, y_0KT () represents to be received from node and believes Number；

Step 3, host node Node₁Signal y is received to host node₀₁T () carries out signal transacting and obtains host node carrier signal x₁₀(t), from node Node_KTo receiving signal y from node_0KT () carries out signal transacting and obtains from node carrier signal x_K0(t)；

Step 4, host node Node₁Data copy signal m (t) is carried in host node carrier signal x₁₀On (t) To host node modulated signal s₁(t)；From node Node_KData copy signal m (t) is carried in from node carrier signal x_K0 Obtained on (t) from node modulated signal s_K(t)；

Step 5, host node Node₁By the host node modulated signal s₁T () is sent to destination node D；From node Node_K Will be described from node modulated signal s_KT () is sent to destination node D；

The host node modulated signal s that step 6, destination node D will be received₁(t) and from node modulated signal s_KT () is superimposed Obtain destination node modulated signal S (t).

In present embodiment, data message copy is the data that sensor network will be transmitted to destination node/satellite；Wave beam Before formation starts, each node obtains data and stores by the data sharing mechanism between net in sensor network.

The formation of wave beam relies primarily on two class nodes, destination node/satellite and source node, source node be divided into host node and from Node.

Process described in present embodiment is assuming that source node and destination node geo-stationary, ignore various disturbing factors Influence under conditions of carry out.

In present embodiment, step 3 realizes carrier phase synchronization, and step 4, step 5 and step 6 realize modulation The superposition of signal, so as to form distributed beams, solving the smaller caused distribution light beam of single sensor power can not The problem of satellite.Forming process in this method from node carrier signal and host node carrier signal is very fast, realizes source section Point and destination node Phase synchronization, and autgmentability is strong.

Specific embodiment two, present embodiment is to be based on sea wireless sensing to the one kind described in specific embodiment one The distributed beams of net form further illustrating for carrier phase synchronization method, in present embodiment, the list described in step 2 Frequency beacon signal x₀T the expression formula of () is

Wherein, t₀Represent initial time, φ₀Initial phase of the single-frequency single-frequency beacon signal at destination node D is represented, w is Frequency, j²=-1, t is the time；

Source node described in step one receives signal y_0iT the expression formula of () is

Wherein, τ_0iRepresent the path delay of time of destination node D to source node Nodei (i=1,2 ..., K)；

As i=1, host node receives signal and is

Work as i=2, during 3 ... K, bring into after source node receives signal expression and be from node reception signal y_0K(t),

From node receive signal expression formula be

Specific embodiment three, reference picture 3 illustrate present embodiment, and present embodiment is to specific embodiment one Or a kind of distributed beams based on sea wireless sense network described in two form further illustrating for carrier phase synchronization method, In present embodiment, host node Node described in step 3₁Signal y is received to host node₀₁T () carries out signal transacting and obtains main section Point carrier signal x₁₀T (), the process for obtaining the host node carrier signal is realized by phase identification of circuit, obtain the master The process of node carrier signal is：

Step 3 one, host node Node₁In local oscillator produce local oscillated signal O₁T (), its expression formula isWherein, φ₁Represent the initial phase of local signal；

Step 3 two, the local oscillated signal O in step 3 one₁(t), host node Node₁Host node receive signal y₀₁T () is also denoted as：

Wherein,It is that host node receives signal y₀₁(t) and signal O₁The phase difference of (t), h (t) Conjugated signal

Step 3 three, the local oscillated signal O₁(t) and conjugated signal h^*T () is multiplied and obtains host node carrier signal x₁₀ (t), the host node carrier signal x₁₀T the expression formula of () is

Specific embodiment four, present embodiment is wireless based on sea to the one kind described in specific embodiment one or two The distributed beams of Sensor Network form further illustrating for carrier phase synchronization method, in present embodiment, described in step 3 From node Node_KTo receiving signal y from node_0KT () carries out signal transacting and obtains from node carrier signal x_K0(t), the acquisition Process from node carrier signal is：

Step 3 A, from node Node_KTo the single-frequency beacon signal x for receiving₀T () carries out obtaining continuation after periodic extension after Single-frequency beacon signal x_0K(t),

Single-frequency beacon signal x after the continuation_0KT () is by from node Node_KIt is denoted as receiving signal y from node_0K(t),From node Node_KDescribed will receive signal y from node_0KT () is forwarded to host node Node₁；

Step 3 B, host node Node₁Signal y is received by will be received from node after periodic extension_0KT () is denoted as prolonging After opening up signal y is received from node_K1(t)；

Step 3 C, host node Node₁After to the continuation signal y is received from node_K1T () carries out phase identification of circuit Process and obtain principal and subordinate's signal x_1K(t)；

Step 3 D, host node Node₁By principal and subordinate's signal x_1KT () is back to from node Node again_K, from node Node_K By principal and subordinate's signal x_1KT () is denoted as from main signal y_1K(t)；

Step 3 E, from node Node_KWill be described from main signal y_1KT () is converted into from node carrier signal x_K0(t),

Specific embodiment five, present embodiment is to be based on sea wireless sensing to the one kind described in specific embodiment four The distributed beams of net form further illustrating for carrier phase synchronization method, in present embodiment, main section described in step 3 C Point Node₁After to the continuation signal y is received from node_K1T () carries out phase identification of circuit and processes and obtain principal and subordinate's signal x_1K (t), it is described to obtain principal and subordinate's signal x_1KT the process of () is：

Step C1, host node Node₁In local oscillator produce local oscillated signal O₁T (), its expression formula isWherein, φ₁Represent the initial phase of local signal；

Step C2, the local oscillated signal O in step C1₁(t), host node Node₁Continuation after from node receive Signal y_K1(t)；It is also denoted as：

Wherein,It is to receive signal y from node after continuation_K1(t) and local oscillated signal O₁The phase difference of (t), τ_K1Represent from node Node_KTo host node Node₁Path delay；h₀The conjugated signal of (t)

Step C3, the local oscillated signal O₁(t) and conjugated signal h₀ ^*T () is multiplied and obtains principal and subordinate's signal x_1K(t), it is described Principal and subordinate's signal x_1KT the expression formula of () is

Specific embodiment six, present embodiment is to be based on sea wireless sensing to the one kind described in specific embodiment one The distributed beams of net form further illustrating for carrier phase synchronization method, in present embodiment, main section described in step 4 Point modulated signal s₁T the expression formula of () is：

It is described from node modulated signal s_KT the expression formula of () is：

Specific embodiment seven, present embodiment is to be based on sea wireless sensing to the one kind described in specific embodiment one The distributed beams of net form further illustrating for carrier phase synchronization method, in present embodiment, target described in step 6 The expression formula of node modulated signal S (t) is：

Specific embodiment eight, present embodiment is to be based on sea wireless sensing to the one kind described in specific embodiment two The distributed beams of net form further illustrating for carrier phase synchronization method, in present embodiment,

Local oscillated signal O₁T () can also exist in the form of sinusoidal signal, be expressed as follows：

O₁(t)=cos [w (t-t₀)+φ₁]。

In present embodiment, host node Node₁Local oscillator produce local oscillated signal O₁T (), signal is expressed as：

O₁(t)=cos [w (t-t₀)+φ₁] (4-1)

Node₁The signal y for receiving₀₁T () is expressed as follows：

y₀₁(t)=cos [w (t-t₀-τ₀₁)+φ₀] (4-2)

y₀₁T () can resolve into O₁The in-phase component of (t) and the form of quadrature component, it is as follows：

y₀₁(t)=y_I(t)·cos[w(t-t₀)+φ₁]+y_Q(t)·sin[w(t-t₀)+φ₁] (4-3)

Wherein y_I(t)、y_QT () represents the coefficient function of in-phase component and quadrature component respectively, arrangement can be obtained

Accordingly, have and comprehensively go out signal x₁₀T () can be expressed as

Specific embodiment nine, present embodiment is that the estimation in all destination nodes and source node to frequency, phase is missed Carried out under the conditions of difference cloth identical, phase estimation error is embodied in φ in present embodiment₀On, it is expressed as Wherein φ_err,kRepresent the mistake that signal is produced when kth time is received Difference；

Estimated frequency error is embodied on w, is expressed as Wherein w_err,k Represent the error that signal is produced when kth time is received.

The process of specific embodiment one to seven is reanalysed under conditions of frequency and phase estimation error is considered, herein The process of simplification is as follows：

Destination node D sends single-frequency single-frequency beacon signal to source node Nodei (i=1,2 ..., N)Here for simple, without loss of generality, if t₀=0；Each source node receives signal, is expressed as

Host node receives signalSignal is received from node

Host node is received signal y by host node₀₁T () by phase identification of circuit process and obtains host node carrier signal x₁₀' (t), host node sends to destination node D the host node carrier signal.

Signal y will be received from node from node_0KT () is transmitted to host node, host node y_0K(t) be denoted as after continuation from Node receives signal y_K1'(t)；

After the continuation of host node signal y is received from node_K1' (t) must after being processed by phase identification of circuit Signal principal and subordinate's signal x is obtained to comprehensive_1K' (t),

Host node is by principal and subordinate's signal x_1K' (t) is fed back to from node, the signal is expressed as from main signal y from node_1K' (t),

Will be described from main signal y from node_1K' (t) is converted into from node carrier signal x_K0' (t) and realization and destination node The communication of D.

Host node carrier signal and from node carrier signal reach destination node D when, be expressed as：

Result above is represented, under conditions of frequency, phase estimation error are present, phase of the carrier signal in destination node Produce deviation.Deviation phase isDue to τ_i1Far smaller than τ_0i, so deviation Principal element in phase is And process total timeTherefore destination node The signal that D is received is expressed as follows：

Symbol () in Y (t)_iRepresent the stochastic variable different for each source node Nodei (i=1,2 ..., N)；Y On the one hand it is to eliminate τ with about equal sign in (t)_i1Influence；On the other hand, for Node₁, it is not different and treats, this is in nodes N than it is larger when allow completely.

When considering the influence of error, the form of the signal that destination node D is received is write out as follows again here：

Power form P (t) of signal can be write as

Formula (3-2) can further be arranged and obtained：

Assuming that the equal Normal Distribution of the frequency of signal, phase estimation error, and estimate that the error for producing is mutual every time It is independent, wherein Formula (3-3) can be write as

Wherein assume t ＞ ＞ τ_0i, in formula (3-4), Pin individually below To w_err、φ_errInfluence to receiving power is discussed.

(1) influence of the phase error to power

The presence of phase error directly results in the decay of power, show that system power decay is missed with phase below by way of emulation Relation between difference size.The quantity N that source node is assumed in simulation process is 100, and average system power is obtained by emulation Efficiency (expect to export N with ideal power by actual power²Ratio) η and phase error variances sigma_φRelation, as shown in Figure 4.

(2) influence of the frequency error to power

Influence from phase error to system-power efficiency is different, and the phase accumulation that frequency error is caused with the time is so that property Can gradually echo off.Under the conditions of obtaining different frequency evaluated error again by emulation below, system-power efficiency η is with the time Change.Identical with (1), emulation assumes that the quantity N of source node is 100.Simulation result is as shown in Figure 5.

When the timing of frequency error one of signal, with the change of time, probability of the system-power efficiency not less than a certain thresholding It is gradually reduced, it is known that the power efficiency of certain lower limit probability cannot be ensured.It is given below to require that efficiency thresholding is closed with the change of time System.Assume that source node number N is 100 in emulation, without loss of generality, frequency error takes σ_w=0.5Hz, as a result as shown in Figure 6.

Specific embodiment ten, present embodiment is one embodiment, illustrates that this method suppresses to be led due to sea fluctuation Caused by the sensor network nodes irregular movement of cause between node signals transmission occur Doppler effect mode.

Joint movements：The sea of nonstatic causes that sensor network nodes are brokenly moved.On the one hand, between node not Regular relative motion makes in synchronization slot, the influence that there is Doppler effect in signals transmission；On the other hand, Wave beam forming In time slot, sensor network changes with the relative position relation of destination node/satellite.In order to discuss joint movements to originally setting The influence that meter scheme is answered, by the Kinematic Decomposition of nodes, discusses influence of each component motion to the stability of a system respectively.For Simply and without loss of generality, it is three components by the Kinematic Decomposition of network intermediate node：The motion of sighting distance radial direction general character, sighting distance are tangential General character motion, internetwork irregular movement, will respectively discuss influence of three components to systematic function below.

It is influence that Doppler motion communicates to master and slave node due to what is discussed, so ignoring signal receives process Present in frequency, phase estimation error, it is believed that the phase of signal, frequency are accurately estimated.Stress that phase between node is discussed Influence to moving, without loss of generality, it is assumed that host node Node₁Be it is actionless, it is irregular relative to host node from node Ground motion.With from node Node₂As a example by, illustrate the suppression from Doppler effect influence during node and host node Phase synchronization Scheme works principle.

If from node Node₂With respect to host node Node₁The speed of relative motion is v.Host node Node₁Local oscillator Produce signal O₁(t)；

Destination node/satellite D Broadcast Single Frequency beacon signals x₀(t)。Node₂Receiving single-frequency beacon signal is

From node Node₂With host node Node₁Between there is no a relative motion under conditions of, i.e. v=0；Wave beam forming time slot In TSN, Node₂Transmission signal x₂₀T (), is expressed as

In Node₂With Node₁When there is relative motion, i.e. v ≠ 0.Node₂By signal y₀₂T () is transmitted to Node₁During, Influenceed by Doppler effect, produced frequency deviation.It is designated as x'₂₁T (), is expressed as

x'₂₁T () is by Node₂With Node₁Between path delay of time τ₂₁Afterwards, node Node is reached₁, signal is received as

Node₁By signal y'₂₁T () after phase identification of circuit treatment by obtaining signal x'₁₂T (), is expressed as

Host node Node₁By signal x'₁₂T () is fed back to from node Node₂, by Node₁With Node₂Between path when Prolong τ₁₂=τ₂₁Shi Yanhou, x'₁₂T () reaches node Node₂, it is received as y'₁₂T (), is expressed as

After arrangement, obtain

Node₂By signal y'₁₂T () is designated as x' as carrier signal₂₀T (), rewrites as follows

Contrasted with formula (5-2), it is as a result as follows

By formula (5-8) as can be seen that signal x'₂₀(t) and x₂₀T () only differs from a factorKnowable to analysis, The factor is characterized, relative motion is produced between node frequency departure and phase deviation, is respectively By In node speed of related movement v compared with electromagnetic wave propagation speed c very little；On the other hand, node Node₂And Node₁Between road The propagation delay time τ that footpath produces₁₂Very little, so this deviation produced due to Doppler effect can be ignored substantially, to systematicness The influence very little of energy.

Claims (4)

1. a kind of distributed beams based on sea wireless sense network form carrier phase synchronization method, and the method includes following step Suddenly：

Step one, source node Node_iObtain and data storage copies signal m (t), source node Node_iMiddle Node₁It is host node, Node_KBe from node, wherein, K is the positive integer more than or equal to 2；I is the positive integer more than or equal to 1；K∈i；

Step 2, destination node D are to source node Node_iSend single-frequency beacon signal x₀(t)；Source node Node_iReceive the single-frequency Beacon signal x₀(t), and form source node reception signal y_0i(t)；

Source node receives signal y_0iY in (t)₀₁T () represents that host node receives signal, y_0KT () represents from node and receives signal；

Step 3, host node Node₁Signal y is received to host node₀₁T () carries out signal transacting and obtains host node carrier signal x₁₀ (t), from node Node_KTo receiving signal y from node_0KT () carries out signal transacting and obtains from node carrier signal x_K0(t)；

Step 4, host node Node₁Data copy signal m (t) is carried in host node carrier signal x₁₀Led on (t) Node modulated signal s₁(t)；From node Node_KData copy signal m (t) is carried in from node carrier signal x_K0(t) On obtain from node modulated signal s_K(t)；

Step 5, host node Node₁By the host node modulated signal s₁T () is sent to destination node D；From node Node_KBy institute State from node modulated signal s_KT () is sent to destination node D；

The host node modulated signal s that step 6, destination node D will be received₁(t) and from node modulated signal s_KT () superposition is obtained Destination node modulated signal S (t)；

Characterized in that, the single-frequency beacon signal x described in step 2₀T the expression formula of () is

Wherein, t₀Represent initial time, φ₀Initial phase of the single frequency reference signal at destination node D is represented, w is frequency, j² =-1, t is the time；

Source node described in step one receives signal y_0iT the expression formula of () is

$y_{0i}\left(t\right)=e^{j\[w(t-t_0-{\mathrm{\τ}}_{0i})+{\mathrm{\φ}}_0\]};$

Wherein, τ_0iRepresent the path delay of time of destination node D to source node Node i (i=1,2 ..., K)；

As i=1, host node receives signal and is

Work as i=2, during 3 ... K, bring into after source node receives signal expression and be from node reception signal y_0K(t),

From node receive signal expression formula be

Host node Node described in step 3₁Signal y is received to host node₀₁T () carries out signal transacting and obtains host node carrier wave letter Number x₁₀T (), the process for obtaining the host node carrier signal is realized by phase identification of circuit, obtain the host node carrier wave The process of signal is：

Step 3 one, host node Node₁In local oscillator produce local oscillated signal O₁T (), its expression formula is

Wherein, φ₁Represent the initial phase of local signal；

Step 3 two, the local oscillated signal O in step 3 one₁(t), host node Node₁Host node receive signal y₀₁ T () is also denoted as：

$y_{01}\left(t\right)=O_1\left(t\right)e^{j\[w(-{\mathrm{\τ}}_{01})+{\mathrm{\φ}}_0-{\mathrm{\φ}}_1\]}=O_1\left(t\right)h\left(t\right)$

Wherein,It is that host node receives signal y₀₁(t) and signal O₁The phase difference of (t), the conjugation of h (t) Signal

Step 3 three, the local oscillated signal O₁(t) and conjugated signal h^*T () is multiplied and obtains host node carrier signal x₁₀(t), The host node carrier signal x₁₀T the expression formula of () is

From node Node described in step 3_KTo receiving signal y from node_0KT () carries out signal transacting and obtains believing from node carrier wave Number x_K0T (), described acquisition from the process of node carrier signal be：

Step 3 A, from node Node_KTo the single-frequency beacon signal x for receiving₀T () obtains the single-frequency after continuation after carrying out periodic extension Beacon signal x_0K(t),

Single-frequency beacon signal x after the continuation_0KT () is by from node Node_KIt is denoted as receiving signal y from node_0K(t),From node Node_KDescribed will receive signal y from node_0KT () is forwarded to host node Node₁；

Step 3 B, host node Node₁Signal y is received by will be received from node after periodic extension_0KT () is denoted as continuation after Receive signal y from node_K1(t)；

Step 3 C, host node Node₁After to the continuation signal y is received from node_K1T () carries out phase identification of circuit treatment And obtain principal and subordinate's signal x_1K(t)；

Step 3 D, host node Node₁By principal and subordinate's signal x_1KT () is back to from node Node again_K, from node Node_KBy institute State principal and subordinate's signal x_1KT () is denoted as from main signal y_1K(t)；

Step 3 E, from node Node_KWill be described from main signal y_1KT () is converted into from node carrier signal x_K0(t),

Host node Node described in step 3 C₁After to the continuation signal y is received from node_K1T () carries out phase identification of circuit Process and obtain principal and subordinate's signal x_1K(t), it is described to obtain principal and subordinate's signal x_1KT the process of () is：

Step C1, host node Node₁In local oscillator produce local oscillated signal O₁T (), its expression formula is

Wherein, φ₁Represent the initial phase of local signal；

Step C2, the local oscillated signal O in step C1₁(t), host node Node₁Continuation after from node receive signal y_K1(t)；It is also denoted as：

$y_{K1}\left(t\right)=O_1\left(t\right)e^{j\[w(-{\mathrm{\τ}}_{0K}-{\mathrm{\τ}}_{K1})+{\mathrm{\φ}}_0-{\mathrm{\φ}}_1\]}=O_1\left(t\right)h_0\left(t\right);$

Wherein,It is to receive signal y from node after continuation_K1(t) and local oscillated signal O₁(t) Phase difference, τ_K1Represent from node Node_KTo host node Node₁Path delay；h₀The conjugated signal of (t)

Step C3, the local oscillated signal O₁(t) and conjugated signal h₀ ^*T () is multiplied and obtains principal and subordinate's signal x_1K(t), the principal and subordinate Signal x_1KT the expression formula of () is

2. a kind of distributed beams based on sea wireless sense network according to claim 1 form carrier phase synchronization side Method, it is characterised in that the s of host node modulated signal described in step 4₁T the expression formula of () is：

$s_1\left(t\right)=m\left(t\right)\·x_{10}\left(t\right)=m\left(t\right)e^{j\[w(t-t_0+{\mathrm{\τ}}_{01})-{\mathrm{\φ}}_0+2{\mathrm{\φ}}_1\]};$

It is described from node modulated signal s_KT the expression formula of () is：

$s_K\left(t\right)=m\left(t\right)\·x_{K0}\left(t\right)=m\left(t\right)e^{j\[w(t-t_0+{\mathrm{\τ}}_{0K})-{\mathrm{\φ}}_0+2{\mathrm{\φ}}_1\]}.$

3. a kind of distributed beams based on sea wireless sense network according to claim 1 form carrier phase synchronization side Method, it is characterised in that the expression formula of destination node modulated signal S (t) described in step 6 is：

$S\left(t\right)=\underset{i=1}{\overset{N}{\Σ}}{s}_i\left(t\right)=Nm\left(t\right)e^{j\[w(t-t_0)-{\mathrm{\φ}}_0+2{\mathrm{\φ}}_1\]}.$

4. a kind of distributed beams based on sea wireless sense network according to claim 1 form carrier phase synchronization side Method, it is characterised in that local oscillated signal O₁T () can also exist in the form of sinusoidal signal, be expressed as follows：

O₁(t)=cos [w (t-t₀)+φ₁]。