CN1248536C - Wireless communications receiver employing quick paging channel symbols - Google Patents

Abstract

A system for efficiently employing a quick paging channel signal to determine the presence of a forthcoming primary paging channel in a wireless communications system employing a quick paging channel and a primary paging channel. The system includes a first mechanism for selectively processing a first quick paging channel symbol and/or a second quick paging channel symbol of a received signal based on a first decision parameter and/or a second decision parameter and providing a first indication in response thereto. A second mechanism processes the first quick paging channel symbol in response to the first indication and provides a second indication in response thereto indicating whether a forthcoming primary paging channel signal should be received and processed. A third mechanism processes the second quick paging channel symbol in response to the first indication and the second indication and provides a third indication in response thereto specifying whether the primary paging channel should be received an processed. In a specific embodiment, the system is adapted for use with a mobile station and further includes a fourth mechanism for selectively employing the third mechanism when the second indication does not indicate that the forthcoming primary paging channel should be received and processed. The first decision parameter <i>CSI1</i> is representative of a quality of a signal environment through which the received signal propagates and is described by the equation (I) where <i>E</i>pilot1 represents the normalized pilot energy of a portion of the pilot signal associated with the first quick paging symbol, and <i>*</i> represents a total energy of a portion of the received signal associated with the first quick paging symbol.

Description

Use the wireless communication receiver of quick paging channel symbols

Technical field

The present invention relates to wireless communication system.Especially, the present invention relates to receiver, described receiver is used for quick paging channel is carried out demodulation in the communication system of using an above paging channel with the promotion processed offline.

Background technology

From search for and rescue the multiple demand application in the internet, applications scope, use wireless communication system.The communication system in reliable, the low-cost and little space of this application requirements, this system have long battery life and the radio telephone of relevant standby time.

Often provide feature such as the cellular telecommunication system of code division multiple access (CDMA) communication system by a plurality of mobile radio stations (as cell phone, mobile unit, radio telephone or mobile phone) of communicating by letter with one or more base station transceiver subsystems (BTS).BTS receives the signal that mobile radio station sends, and often is forwarded to the mobile switching centre (MSC) with base station controller (BSC).Then MSC is delivered to public switched telephone network (PSTN) or other radio telephone to signal.Similarly, can send to radio telephone to signal from PSTN by base station or BTS and MSC.

Wireless communication networks often uses the various channels such as paging channel and traffic channel to promote communication between radio telephone and the BTS, such as in the IS-95 cellular telephony standard announcement.BTS sends to the radio telephone that is associated to beep-page message with the indication incoming call through paging channel.In case radio telephone detects beep-page message, just between radio telephone and the BTS that is associated, send the service negotiation message sequence to set up traffic channel.Traffic channel is generally supported speech and data traffic.

Traditionally, radio telephone is constantly monitored the paging of indication incoming call on the paging channel.Wireless telephonic receiver keeps connecting, and the signal processing circuit in the radio telephone is carried out demodulation to paging channel simultaneously, whether sends paging to judge.Unfortunately, receiver draws too much power, and this has limited the telephone cells life-span widely.

In radio telephone and/or the network followed, often use the system of radio telephone power consumption minimum, to prolong telephone cells life-span, i.e. stand-by time.In order to improve stand-by time, some newer radio telephone is operated with slotted mode.In slotted mode, the predetermined paging time-slot according to setting up according to the IS-95 telecommunication standard periodically encourages wireless telephonic receiver.During paging time-slot, the BTS that is associated sends paging.By periodically receiver being powered up and to paging channel demodulation, rather than the whole paging channel of demodulation continuously before resembling, thereby the radio telephone stand-by time is prolonged.

Unfortunately, paging channel message often is long, and needs to prolong processing, and this has increased the power consumption of phone, and has reduced battery life and relevant stand-by time.In addition, the redundancy of the longer paging channel message of design needs of this system and the paging channel that is associated is handled and is detected incoming call.This has further reduced the telephone cells life-span.

By be known as processed offline to the IS-95 telecommunication standard quite new augment the further stand-by time that increases phone.In using the wireless communication networks of processed offline, a pair of quick paging channel (QPCH) code-element period send to radio telephone.Quick paging channel symbols (that is fast paging) expression exists or does not exist and will go up the incoming call of setting up at upcoming traffic channel (F-CCCH).The QPCH code element arrives in pairs with the speed of 9600 bits per seconds (bps) or 4800bps.Radio telephone is known to send the time slot of QPCH code element from the BTS that is associated, and it periodically switches on receiver at corresponding time slot place.

In the radio telephone that uses processed offline, make the radio receiver energising, to the QPCH sampling, turn-off receiver then immediately, and (when receiver turn-offs) processed offline QPCH sampling.The subsequent analysis of QPCH sampling or some samplings represents whether radio telephone should make the receiver energising and to paging channel demodulation, to receive the calling paging that is associated with incoming call.The use of QPCH helps to reduce the actuation duration of receiver and finishes the example of paging channel demodulation, makes the reduction of radio telephone power consumption and the telephone cells life-time dilatation that is associated becomes possibility.Unfortunately, be used for QPCH is carried out demodulation and judges the existing system whether handle follow-up whole paging channel and method is too big, expense is high, the power that overruns according to QPCH, and general efficient is not high.In addition, existing system often fails to use effectively the noise power of QPCH code element and received signal to estimate both, to judge whether handle upcoming whole paging channel effectively.

Therefore, needing effectively a kind of in the art and system and method cheaply, described system and method is used for receiving and handling quick paging channel symbols, whether handles upcoming whole paging channel to judge.Further a kind of efficient system of demand and method, described system and method uses noise power to estimate, and optionally use one or two code element of each quick paging channel time slot according to existing signal environment, to carry out the most effective by minimal hardware to the calling paging that exists and reliable detection.

Summary of the invention

System of the present invention is at the demand in the technical field, and described system is used for using effectively quick paging channel symbols to judge the existence of upcoming basic (primary) paging channel.In example embodiment, system of the present invention is suitable for using with the wireless communication system that uses quick paging channel and basic paging channel.

The invention provides a kind of system, be used for using effectively the quick paging channel signal to judge and have upcoming basic paging channel signal at the wireless communication system that uses quick paging channel and basic paging channel, wherein, described system comprises: first device, be used for selectively handling first quick paging channel symbols and/or second quick paging channel symbols of received signal, and provide first indication according to it according to first critical parameter and/or second critical parameter; Second device is used for handling first quick paging channel symbols according to first indication, and provides second indication according to it, and whether the described second indication expression receives and handle upcoming basic paging channel signal; And the 3rd device, being used for handling second quick paging channel symbols, and providing the 3rd indication according to it according to first indication and second indication, described the 3rd indication represents whether to receive and handle basic paging channel.

In a particular embodiment, system is suitable for using with mobile radio station, and described system further comprises the 4th device, is used for indicating and selectively using the 3rd device when receiving and handling upcoming basic paging channel when second.First critical parameter (the CSI ₁) the expression received signal the signal environment quality of process, and describe by following formula:

${\mathrm{CSI}}_1=\frac{E_{\mathrm{pilot}1}}{{\hat{I}}_{o1}},$

Wherein, E _Pilot1The normalized pilot energy of a part of pilot signal that expression is associated with first quick paging channel symbols, and  _O1The gross energy of a part of received signal that expression is associated with the first fast paging code element.Following formula is described the second critical parameter (D ₁):

${\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="C0180377400221.png"\; state="\{\{state\}\}">D</figure-callout>}}_1=\frac{{\mathrm{QP}}_1}{{\mathrm{<figure-callout\; id="1"\; label="E\; pilot"\; filenames="C0180377400221.png"\; state="\{\{state\}\}">E</figure-callout>}}_{\mathrm{pilot}}},$

Wherein, QP ₁Be dot product, vector product or their combination (according to the pattern of mobile radio station) of first code element and associated pilot signal estimated value.First comparison means compares first critical parameter and deletion threshold value, and handles first quick paging channel symbols according to relatively indication (by first indication) during greater than predetermined deletion threshold value when first critical parameter.First comparison means by the first indication indication when first critical parameter processing second fast paging code element (not being the first fast paging code element) during less than the deletion threshold value.

Second device comprises second comparison means, is used for the second critical parameter (D ₁) and the first on-off threshold value compare, and by second the indication make indication, do not receive and handle upcoming paging channel for upcoming paging.Another device that is included in second device selectively makes mobile radio station be in sleep state according to second indication.Second comparison means is made indication by second indication, when first indicate handle immediately second quick paging channel and when second critical parameter greater than lead to-during the threshold value of breaking, handle second quick paging channel symbols.

The 3rd device comprises a device, is used for selectively calculating following critical parameter (D) according to indicating device:

$D=\frac{\frac{{\mathrm{<figure-callout\; id="1"\; label="QP"\; filenames="C0180377400221.png"\; state="\{\{state\}\}">QP</figure-callout>}}_1}{{\mathrm{\&sigma;}}_1^2}+\frac{{\mathrm{QP}}_2}{{\mathrm{\&sigma;}}_2^2}}{\frac{{\mathrm{<figure-callout\; id="1"\; label="E\; pilot"\; filenames="C0180377400221.png"\; state="\{\{state\}\}">E</figure-callout>}}_{\mathrm{pilot}}}{{\mathrm{\&sigma;}}_1^2}+\frac{E_{\mathrm{pilot}2}}{{\mathrm{\&sigma;}}_2^2}},$

Wherein, σ ₁ ²The total noise power of representing the estimation on all multipath components, described all multipath components are associated with a part of received signal that comprises first quick paging channel symbols; σ ₂ ²The total noise power that expression is associated with a part of received signal that comprises second quick paging channel symbols; QP ₂Be second quick paging channel symbols signal component and with pilot signal that second quick paging channel symbols is associated between dot product, vector product or their combination; And E _Pilot2The pilot energy that expression is associated with the second pilot channel code element.The 3rd device further comprises a device, be used for D and second logical-disconnected threshold value are compared, and make indication by the 3rd indication, when D greater than second logical-handle upcoming basic paging channel during disconnected threshold value, and make indication by the 3rd indication, when D does not handle upcoming basic paging channel during roughly less than the second on-off threshold value.

The fast paging signal that the present invention also provides a kind of basis to be associated with quick paging channel indicates whether to receive and handle the system of the upcoming paging on the basic paging channel, it comprises: first device, be used for calculating first parameter, the signal environment quality of the described system works of described first parametric representation according to the received signal that contains described fast paging signal and pilot signal; Second installs, and is used for selectively handling according to described first parameter first code element of described fast paging signal, and provides second parameter, the signal strength signal intensity of the described fast paging signal of described second parametric representation according to it; The 3rd device, being used for according to described first parameter and described second parameter decision is second code element of handling described quick paging channel signal, also provides first indication, expression is not handled described basic paging channel to upcoming paging; And the 4th the device, be used for selectively handling described second code element of described quick paging channel signal according to the 3rd device, described the 4th device comprises a kind of device, be used to use the noise power estimated value that is associated with the described first fast paging code element and the described second fast paging code element, and the energy of the energy of described pilot signal and the described quick paging channel signal that is associated with the described second fast paging code element provides second indication, and whether expression handles described paging channel for described upcoming paging.

First device and second device have promoted novel designs of the present invention, they handle first quick paging channel symbols and/or second quick paging channel symbols on demand on strategy, avoid the unessential sometimes processing of second quick paging channel symbols, the maximum probability of success that detects upcoming basic paging channel is provided again.The optimal decision of when handling upcoming basic paging is measured obtains further reliability by selectively using the noise power estimated value be associated with first and second quick paging channel symbols to calculate to be used to judge.

Description of drawings

Fig. 1 is the figure according to the example wireless communication system of theory formation of the present invention.

Fig. 2 is the more detailed figure of the mobile radio station of Fig. 1, and unique quick paging channel (QPCH) combiner and the QPCH detector that constitute according to theory of the present invention are shown.

Fig. 3 is the flow chart of a kind of method of being implemented by the mobile radio station of Fig. 2 by the QPCH combiner of Fig. 2 and QPCH detector.

Embodiment

Though describe the present invention with reference to the example embodiment of application-specific here, should be appreciated that to the invention is not restricted to this.Be familiar with present technique field basic fundamental and the personnel that the theory that provides is provided here and will appreciate that within the scope of the present invention other modification, application and embodiment and the present invention other field that great utilization is arranged.

Fig. 1 is the block diagram that is suitable for example wireless communication system 10 of the present invention.System 10 comprises the mobile switching centre (MSC) 12 of (BSC) 14 that have base station controller.Public switched telephone network (PSTN) 16 transmits calling between telephone line and other network and communicator (not shown) and MSC 12.MSC 12 transmits between PSTN 16 and a BTS 18 who is associated with first sub-district 22 and second sub-district 24 respectively and the 2nd BTS 20 and calls out.Often BTS 18 and 20 is called Cell Site Controller.

MSC 12 transmits calling between BTS 18 and 20.The one BTS 18 directs the call to first mobile radio station 26 in first sub-district 22 by first communication link 28.Communication link 28 is the two-way links with forward link 30 and reverse link 32.Generally, when BTS 18 set up Speech Communication with mobile radio station 26, the feature of link 28 was as traffic channel.Though two BTS 18 and 20 only are shown in Fig. 1, can use more BTS or BTS still less and do not depart from scope of the present invention.

When mobile radio station 26 when first sub-district 22 moves to second sub-district 24, make mobile radio station 26 be handed over to the 2nd BTS 20.Generally, in the overlapping region 36 of first sub-district 22 and second sub-district 24 handover takes place.In soft handover, mobile radio station 26 is also set up second communication link 34 with target BTS 20 except setting up first communication link 28 with source BTS 18.During soft handover, keep simultaneously first link 28 and second link 34 both.After mobile radio station 26 had traversed in second sub-district 24, it can lose first communication link 28.In hard handoff switches, do not set up communication link 34.When mobile radio station 26 when first sub-district 22 moves to second sub-district 24, be lost to the link 28 of source BTS 18, and form new link with target BTS 20.

Fig. 2 is a radio telephone, i.e. the mobile radio station 26 of Fig. 1, more detailed figure, unique quick paging channel (QPCH) combiner (demodulation code element (D) computer) 40 and the QPCH detector 42 that constitute according to theory of the present invention are shown.For the sake of clarity, omit various elements among Fig. 2, such as intermediate frequency (IF) to baseband converter, frequency mixer, low-converter, oscillator, timer, power supply and amplifier, yet those skilled in the art that can know wherein and how implement essential element in addition.

Mobile radio station 26 comprises transceiver 44, and described transceiver 44 has the antenna 46 that is connected to duplexer 48.Duplexer 48 is connected to the input of cdma receiver part 50 and the output of CDMA transmitter 52.Baseband processor 54 is connected to CDMA transceiver 44, and comprises noise estimator 38, controller 56, sampling random-access memory (ram) 58, interpolater 60, searcher 62, received energy estimator 64, despreader/go to cover device circuit 66, pilot estimator (pilot filter) 68, pilot energy counting circuit 70, demodulator 72, QPCH combiner 40, QPCH paging detector 42, Viterbi (Viterbi) decoder 74, QPCH memory 80 and encoder 76.

Controller 56 is connected to the bus 78 that the control input is offered CDMA transmitter 52 and cdma receiver 50.The output of cdma receiver 50 is digital received signals, and it is offered the sampling RAM 58 of baseband processor 54 as input.The output of sampling RAM 58 is input to interpolater 60.The output of interpolater 60 is connected to searcher 62 and despreader/go the to cover input of device circuit 66.An output expression of searcher 62 is input to controller software/circuit 56 to it corresponding to the peak value of candidate pilot.The pilot tone output expression that despreader/go covers device circuit 66 has k homophase (I _Pilotk) and quadrature (Q _Pilotk) the pilot signal estimated value of signal component, each k multi-path signal-component has an I _PilotkAnd Q _PilotkComponent.The pilot tone output that despreader/go covers device circuit 66 is provided to the input of pilot estimator (pilot filter) 68 and noise estimator 38.The output of noise estimator 38 is input to QPCH combiner 40, and the k path noise power estimated value that is associated with the corresponding first or the 2nd QPCH code element of expression, for k multipath QPCH signal component after testing, the described first or the 2nd QPCH code element is respectively the code element σ that is associated by with a QPCH code element and the 2nd QPCH code element of time slot ² _1KAnd σ ² _2KExpression.The pilot tone estimated value through filtering is represented in the output of pilot estimator 68, and it is input to demodulator 72 and pilot energy counting circuit 70.The output of pilot energy counting circuit 70 is connected to the input of QPCH combiner 40.

Traffic/the data channel of despreader/go to cover device circuit 66, basic (whole) paging channel and QPCH channel are input to demodulator 72.The dot product of demodulator 72, vector product and/or dot product+vector product output and QPCH paging output are offered QPCH combiner 40 as input.Can ignore the output of dot product+vector product, and the summation of in QPCH combiner 40, calculating rather than in demodulator 72, calculate, this do not departed from

Scope of invention.

After further handling, the traffic of demodulator 72 and basic paging channel output are offered Viterbi decoder 74 as input by the subsystem such as calibration and deinterleaving circuit (seeing the IS-95 specification).The output of decoder 74 is connected to the input of controller 56.QPCH combiner 40 communicates with paging detector 42, the output of described paging detector 42 is connected to the input of controller 56.QPCH memory 80 receives the input from QPCH combiner 40 and controller software/circuit 56, and output is offered paging detector 42.

In operation, the CDMA signal that receives by antenna 46 is directed to cdma receiver 50 by duplexer 48.Cdma receiver 50 comprises radio frequency to the intermediate frequency conversion circuit (not shown), is used for institute received RF signal (Rx) is mixed to intermediate-freuqncy signal.Automatic gain control (AGC) circuit (not shown) is adjusted to predetermined value to the gross power of received signal.Other freq converting circuit (not shown) is mixed to analog baseband signal to intermediate-freuqncy signal, by the analog to digital converter (not shown) analog baseband signal is converted to digital baseband signal then.Digital baseband signal comprises homophase (I), quadrature (Q) and noise signal component.

Similarly, CDMA transmitter 52 comprises the freq converting circuit (not shown), is used for the digital input signals (having homophase and quadrature signal component) of encoder 76 outputs is converted to analog radio-frequency signal, to prepare by antenna 46 transmissions.

Sampling RAM 58 in the baseband processor 54 is by the digital baseband signal sampling of predetermined time slot to receiving from cdma receiver 50.Sampling RAM 58 is kept at sampling in the buffer (not shown), uses for the following circuit of processed offline in greater detail.Used predetermined time slot when determining that according to the IS-95 telecommunication standard sampling RAM 58 carries out the sampling of received signals.When mobile radio station 26 was not operated with the pattern of minute time slot, the enabling signal that receives by slave controller 56 can selectively make sampling RAM 58 bypasses.Can use other system and method for selectively bypass sampling RAM 58 and not depart from scope of the present invention.

The sample of signal length of sampling RAM 58 interceptings is directly relevant with the size of sampling RAM 58.Sampling 58 pairs of signal environments of RAM (that is, received signal) sampling, the enough information of collecting the QPCH of relevant received signal is to promote processed offline.

The output of sampling RAM 58 is connected to interpolater 60.60 pairs of digital signals from sampling RAM 58 outputs of interpolater upconvert to higher numerical frequency.In this specific embodiment, equal the speed of institute's receiving digital signals from the speed of the digital signal of sampling RAM 58 output, be the twice of spreading rate.Interpolater 60 becomes the rate transition of digital signal 8 times (CHIP * 8) of spreading rate.Those skilled in the art that will appreciate that the definite speed of the digital signal that mobile radio station 26 uses is special-purpose, and can be determined by those skilled in the art that, to meet the requirement of given application.

As sampling RAM 58 when received signal having been taken a sample, interpolater 60 offers searcher 62 and despreader/go to cover device circuit 66 to the up-conversion digital signal with homophase and quadrature signal component.Searcher 62 is analyzed the signal that is received, and candidate's pilot tone peak value (peak value of each multipath component) is outputed to controller software/circuit 56.

In one embodiment of the invention, according to the u.s. patent application serial number 09/696 that is entitled as " effective system and the method that in wireless communication system, promote the quick paging channel demodulation " (Atty.Docket No.D990319) that proposed on October 23rd, 2000 by effective off-line search device by the present inventor, theory in 160 has been implemented searcher 62, this patent has transferred assignee of the present invention, and is incorporated herein by reference.On the other hand, can implement searcher 62, be familiar with the present technique art and can constitute described pilot tone despreader and not depart from scope of the present invention with the personnel that contact theory of the present invention as the pilot tone despreader.

Noise estimator 38 usefulness receive the predetermined knowledge of total received signal energy of the agc circuit (not shown) setting in the chain 50, estimate the noise be associated with a QPCH code element and the 2nd QPCH code element of time slot, and each k multi-path signal-component is distinguished output noise estimate of variance σ according to it ² _1KAnd σ ² _2KCan be by many in the art method calculating noise variance estimation values sigma of knowing ² _1KAnd σ ² _2K

Implement pilot estimator 68 as finite impulse response filter (FIR) or infinite impulse response filter (IIR).The noisy pilot signal filtering noise that pilot estimator 68 provides from searcher 62, and provide the pilot signal estimated value according to it

The pilot signal estimated value Comprise the homophase (I that is associated with k pilot tone multi-path signal-component _Pilotk) and quadrature phase (Q _Pilotk) signal component, and pass through column vector down

Expression:

${\hat{P}}_k=(I_{\mathrm{pilo}{t}_k},Q_{{\mathrm{pilot}}_k}),...\left[1\right]$

The additional subscript of interpolation such as 1 or 2, being used to specify given signal component still is second code element corresponding to first code element of reception QPCH signal slot respectively.For example, ${\hat{P}}_{1k}=(I_{\mathrm{pilot}1k},Q_{\mathrm{pilot}1k})$ Be meant the k multipath pilot tone estimated value that is associated with a QPCH code element.When pilot signal and QPCH code element almost receive simultaneously and same signal sampling at sampling RAM 58 in when providing, pilot signal is associated in or corresponding to the QPCH code element.

The pilot signal estimated value Offer demodulator 72 and pilot energy counting circuit 70.Pilot energy counting circuit 70 makes the pilot signal estimated value Square, and the energy (E of k pilot tone multi-path signal-component _Pilotk) estimated value offer QPCH combiner 40.Pilot energy E _PilotkComprise the first component E that is associated with a QPCH code element of QPCH time slot _Pilot1kAnd the second component E that is associated with the 2nd QPCH code element of QPCH time slot _Pilot2kQPCH combiner 40 comprises an integrator (not shown), is used on k pilot tone multipath pilot energy E _Pilot1kAnd E _Pilot2kSue for peace, produce E respectively according to following formula _Pilot1And E _Pilot2:

${\mathrm{<figure-callout\; id="1"\; label="E\; pilot"\; filenames="C0180377400221.png"\; state="\{\{state\}\}">E</figure-callout>}}_{\mathrm{pilot}}=\underset{k}{\mathrm{\&Sigma;}}{E}_{\mathrm{pilot}{1}_k},...\left[2\right]$

$E_{\mathrm{pilot}2}=\underset{k}{\mathrm{\&Sigma;}}{E}_{\mathrm{pilot}{2}_k},...\left[3\right]$

Wherein, E _Pilot1kBe the pilot energy that is associated with the k multi-path signal-component of a QPCH code element of QPCH time slot, and E _Pilot2kIt is the pilot energy that is associated with the k multi-path signal-component of the 2nd QPCH code element of QPCH time slot.

QPCH combiner 40 uses from the Noise Variance Estimation value σ of noise estimator 38 outputs ² _1KAnd σ ² _2KTo calculate the total noise power estimation values sigma ² ₁And σ ² ₂, be used to calculate demodulation code element decision metric D, following discussion more fully.By following formula the noise power estimation values sigma is described ² ₁And σ ² ₂:

${\mathrm{\&sigma;}}_1^2=\frac{\underset{k}{\mathrm{\&Sigma;}}{\mathrm{\&sigma;}}_{1k}^2{E}_{\mathrm{pilot}1\mathrm{<figure-callout\; id="1"\; label="k\; E\; pilot"\; filenames="C0180377400221.png"\; state="\{\{state\}\}">k</figure-callout>}}}{E_{\mathrm{pilot}}},...\left[4\right]$

${\mathrm{\&sigma;}}_2^2=\frac{\underset{k}{\mathrm{\&Sigma;}}{\mathrm{\&sigma;}}_{2k}^2{E}_{\mathrm{pilot}2k}}{E_{\mathrm{pilot}2}},...\left[5\right]$

Wherein, each code element as mentioned above.

Despreader/remove to cover device circuit 66 comprises that a pseudo noise despreader (not shown) and M array Walsh remove to cover the circuit (not shown), if the QPCH of the received signal of pilot channel, data channel, basic paging channel and interpolater 60 outputs is present in the received signal, then they are gone to cover.M is 64 in the present embodiment.Channel through going to cover is offered demodulator 72.

Demodulator 72 calculates from despreader/go and covers QPCH signal that device circuit 66 receives and from the pilot tone estimated value of pilot estimator 68 outputs

Between dot product, vector product or both (according to the communication pattern of system 26, following describe more fully).In this specific embodiment, the QPCH signal comprises having according to first code element of IS-95 telecommunication standard definition and the time slot of second code element.

Has corresponding pilot tone estimated value according to following formula definition The dot product (dot of a QPCH code element (QPCH1) ₁):

${\mathrm{<figure-callout\; id="1"\; label="dot"\; filenames="C0180377400221.png"\; state="\{\{state\}\}">dot</figure-callout>}}_1=\underset{k}{\mathrm{\&Sigma;}}(I_{{\mathrm{pilot}1}_k}{I}_{\mathrm{QPCH}{1}_k}+Q_{\mathrm{pilot}{1}_k}{Q}_{\mathrm{QPCH}{1}_k}),...\left[6\right]$

Wherein, k is the number of the obtained multipath component of received signal; I _Pilot1kIt is the in-phase component of the pilot tone estimated value that is associated with the k multipath component of a QPCH code element of time slot; I _QPCH1kIt is the in-phase component of the k multipath component of a QPCH code element; Q _Pilot1It is the quadrature component of the k multipath component of the pilot tone estimated value that is associated with a QPCH code element; Q _QPCH1kIt is the quadrature component of k multipath component of a QPCH code element of QPCH signal.

Similarly, has corresponding pilot tone estimated value according to following formula definition The dot product (dot of the 2nd QPCH code element (QPCH2) ₂):

${\mathrm{dot}}_2=\underset{k}{\mathrm{\&Sigma;}}(I_{{\mathrm{pilot}2}_k}{I}_{\mathrm{QPCH}{2}_k}+Q_{\mathrm{pilot}{2}_k}{Q}_{\mathrm{QPCH}{2}_k}),...\left[7\right]$

Wherein, those of indivedual code elements and top formula (6) definition are similar, still are associated with the 2nd QPCH code element of time slot rather than are associated with a QPCH code element of time slot.

Propose on May 30th, 1997, people's such as Butler the pending U.S. Patent Application sequence number 08/865 that is entitled as " double-channel slotted paging " (Atty.Docket No.D714PSA.7E30), disclose the other detailed description that uses quick paging channel for the purpose of processed offline in 650, this patent has transferred assignee of the present invention, and is incorporated herein by reference.Propose on February 19th, 1999, people's such as Agrawal the pending U.S. Patent Application sequence number 09/252 that is entitled as " using quick paging channel to make the longest method and apparatus of stand-by time ", disclosing another QPCH in 864 describes in detail, this patent has transferred assignee of the present invention, and is incorporated herein by reference.

Demodulator 72 calculates the first dot product (dot that is associated with a QPCH code element respectively ₁), the second dot product (dot that is associated with the 2nd QPCH code element ₂), and/or the vector product cross that is associated with the first and second QPCH code elements ₁And cross ₂, and the result offered QPCH combiner 40.According to following formula definition vector product cross ₁And cross ₂:

$\mathrm{<figure-callout\; id="1"\; label="cro\; ss"\; filenames="C0180377400221.png"\; state="\{\{state\}\}">cro</figure-callout>}{\mathrm{ss}}_{}{}_1=\underset{k}{\mathrm{\&Sigma;}}(I_{\mathrm{pilot}{1}_k}{Q}_{\mathrm{QPCH}{1}_k}-Q_{\mathrm{pilot}{1}_k}{I}_{\mathrm{QPCH}{1}_k}),...\left[8\right]$

${\mathrm{cross}}_2=\underset{k}{\mathrm{\&Sigma;}}(I_{\mathrm{pilot}{2}_k}{Q}_{\mathrm{QPCH}{2}_k}-Q_{\mathrm{pilot}{2}_k}{I}_{\mathrm{QPCH}{2}_k}),...\left[9\right]$

Wherein, indivedual code elements as above-mentioned formula (6) and (7) definition.

No matter demodulator 72 calculates dot product or vector product, all be special-purpose, and depend on the pattern of system 26.For example, (in 1 * MC) system (1 * MC does not have OTD), demodulator 72 calculates dot product and vector product according to formula (4) to (9), and dot there not being 1 multicarrier of orthogonal transmit diversity (OTD) ₁+ cross ₁And dot ₂+ cross ₂Output to QPCH combiner 40.(in 3 * MC) systems and have in 1 * MC system of OTD, demodulator 72 is according to the summation of requirement output dot product, vector product or the dot product and the vector product of given application at 3 multicarriers.With reference to this theory, the personnel that are familiar with present technique field basic fundamental can determine suitable demodulator output, to meet the requirement of given application.Can in QPCH combiner 40, carry out the addition (dot of dot product and vector product ₁+ cross ₁And dot ₂+ cross ₂) and do not depart from scope of the present invention.

For the output that is associated with a QPCH code element of time slot, use QP ₁Show the output of the demodulator 72 that is input to QPCH combiner 40, and, use QP for the output that is associated with the 2nd QPCH code element of time slot ₂The various outputs of in tabulating down, summarizing the demodulator 72 of various system patterns.

Table 1

Pattern	(QP) calculated in fast paging
		1 * MC does not have OTD	QP 1＝dot 1+cross 1， QP 2＝dot 2+cross 2

1 * MC OTD, or 3 * MC

QP 1＝dot 1、cross 1Or dot 1+cross 1 QP 2＝dot 2、cross 2Or dot 2+cross 2

On the other hand, except dot product and/or vector product or alternative dot product and/or vector product, can offer the other composite function of the pilot tone estimated value and the first and second QPCH code elements QPCH combiner 40 and not depart from scope of the present invention.

When mobile radio station 26 was being handled the traffic channel of calling or other type, if available words, demodulator 72 can also offer Viterbi decoder 74 to data/telephone traffic signal.Then, the data/telephone traffic signal of decoder 74 pairs of expressions speech or other categorical data is decoded, and the signal through decoding is offered controller 56.Controller 56 uses various hardware and/or software module (not shown), and the signal through decoding is delivered to microphone or other software or hardware feature (not shown).

QPCH combiner 40 calculates the first critical parameter (CSI ₁), this parameter be carrier signal to interference ratio, be also referred to as the normalization pilot energy, and describe by following formula:

${\mathrm{<figure-callout\; id="1"\; label="CSI"\; filenames="C0180377400221.png"\; state="\{\{state\}\}">CSI</figure-callout>}}_1=\frac{E_{\mathrm{pilot}1}}{{\hat{I}}_{\mathrm{<figure-callout\; id="1"\; label="o"\; filenames="C0180377400221.png"\; state="\{\{state\}\}">o</figure-callout>}1}},...\left[10\right]$

Wherein, CSI ₁It is the normalization pilot energy that is associated with a QPCH code element of time slot; E _Pilot1It is the energy of the pilot signal that receives simultaneously with the QPCH code element part of on all multipath components, suing for peace;  _O1Be the gross energy of received signal part, comprise the noise and the interference that receive simultaneously with a QPCH code element.

Similarly, QPCH combiner 40 calculates the second critical parameter CSI of the 2nd QPCH code element of time slot on demand according to following formula ₂:

${\mathrm{CSI}}_2=\frac{E_{\mathrm{pilot}2}}{{\hat{I}}_{o2}},...\left[11\right]$

Wherein, code element such as above-mentioned formula (10) description, but be associated with the 2nd QPCH code element of time slot.

In this specific embodiment, be scheduled to  by agc circuit and gain-controlled amplifier (GCA) (not shown) that CDMA receives in the chain 50 _O1And  _O2Yet,, can estimate  by the Energy Estimation device _O1And  _O2Or can determine  by other mechanism _O1And  _O2And do not depart from scope of the present invention.

The 3rd critical parameter D ₁Be novel decision metric, the value of a QPCH code element of expression QPCH time slot, describe by following formula:

${\mathrm{<figure-callout\; id="1"\; label="D"\; filenames="C0180377400221.png"\; state="\{\{state\}\}">D</figure-callout>}}_1=\frac{{\mathrm{QP}}_1}{{\mathrm{<figure-callout\; id="1"\; label="E\; pilot"\; filenames="C0180377400221.png"\; state="\{\{state\}\}">E</figure-callout>}}_{\mathrm{pilot}}},...\left[12\right]$

Wherein, QP ₁And E _Pilot1As mentioned above.

QPCH combiner 40 on all available multipath components to parameters C SI ₁And D ₁Sue for peace, and when 42 requests of paging detector, the result is offered paging detector 42, it is worked according to the following unique method of discussing more fully of the present invention.Those skilled in the art that contact this theory, can constitute to be applicable to QPCH combiner of the present invention and paging detector.

When 42 requests of paging detector, QPCH combiner 40 uses fast paging (QP) value QP ₁And QP ₂, pilot energy estimated value E _Pilot1And E _Pilot2, and the received signal Energy Estimation value  that is associated with the first and second QPCH code elements respectively _O1And  _O2, calculate demodulation code element according to following formula, that is, and decision metric D:

$D=\frac{\frac{{\mathrm{<figure-callout\; id="1"\; label="QP"\; filenames="C0180377400221.png"\; state="\{\{state\}\}">QP</figure-callout>}}_1}{{\mathrm{\&sigma;}}_1^2}+\frac{{\mathrm{QP}}_2}{{\mathrm{\&sigma;}}_2^2}}{\frac{{\mathrm{<figure-callout\; id="1"\; label="E\; pilot"\; filenames="C0180377400221.png"\; state="\{\{state\}\}">E</figure-callout>}}_{\mathrm{pilot}}}{{\mathrm{\&sigma;}}_1^2}+\frac{E_{\mathrm{pilot}2}}{{\mathrm{\&sigma;}}_2^2}},...\left[13\right]$

Wherein, D comprises first code element and second code element of the QPCH time slot that receives, and the value that is switched on or switched off corresponding to the QPCH paging of time slot of expression; σ ₁ ²It is noise power with the received signal part correlation connection that comprises a QPCH code element; σ ₂ ²It is noise power with the received signal part correlation connection that comprises the 2nd QPCH code element; And all the other parameters as mentioned above.

Paging detector 42 is selectively to parameters C SI ₁, CSI ₂, D ₁And D and predetermined threshold compare, to judge then whether mobile radio station 26 should make cdma receiver 50 energisings, to receive and to handle the upcoming whole paging that sends by basic paging channel, following discussion more fully.When paging detector 42 according to above-mentioned parameter (CSI ₁, CSI ₂, D ₁And D) and predetermined threshold extremely one or more, when judgement should receive and handle upcoming whole paging, suitable indication is sent to controller 56, indication should be according to IS-95 pattern field cdma receiver 50, with the basic paging channel that receives and demodulation will soon be arrived at once.Then, in the moment corresponding to the time slot that will receive basic paging channel, by the control signal of transmitting via bus 78, controller 56 excitation cdma receivers 50, and make sampling RAM 58 be in bypass mode.Automatically start decoder 74 by the signaling information that is included in the received signal.

When mobile radio station 26 receives whole paging on basic paging channel,,, and offer the decoder 74 that paging is decoded by demodulator 72 combination multipath components by despreader/remove to cover device circuit 66 to make paging go expansion.From decoder 74 beep-page message of forming is delivered to controller 56.Many in the art software and/or hardware circuits of knowing in controller 56 carry out decipher to paging.If the incoming call that is associated with upcoming traffic channel is represented in paging, then controller 56 sends the various modules of suitable control command in the mobile radio station 26, handles upcoming traffic channel to prepare mobile radio station 26.

If according to parameters C SI ₁, CSI ₂, D ₁And the one or more judgements among the D should not handle basic paging channel, then an indication are sent to controller 56, illustrate that the whole paging on the basic paging channel is not upcoming.Then, controller 56 makes transceiver part 44 outage, and makes mobile radio station 26 enter sleep state, such as in the IS-95 telecommunication standard definition.QPCH is carried out on-off keying (OOK) modulation, and D ₁Help indication to have or do not exist (be respectively and be switched on or switched off) upcoming paging channel with the value of D.

Fig. 3 is QPCH combiner 40, QPCH detector 42 and the QPCH memory 80 via Fig. 2, the flow chart of the method 100 that the mobile radio station 26 by Fig. 2 is implemented.With reference to figure 2 and 3, in initial receiving step 102, from interpolater 60 output institute receiving digital signals.Received signal comprises the pilot signal component and comprises the QPCH signal component of first code element of QPCH time slot.Pilot estimator 68 is from the pilot signal component of institute's receiving digital signals output corresponding to a QPCH code element, and the pilot signal component offered pilot energy counting circuit 70, pilot energy counting circuit 70 calculates pilot energy on all available multipaths according to formula (2) and sues for peace, to produce E _Pilot1The pilot energy E that is produced _Pilot1It is the estimated value of the pilot energy that is associated with a QPCH code element.Then, control is delivered to signal quality step 104.

In signal quality step 104, calculate the normalization pilot energy (CSI that is associated with a QPCH code element ₁), this is the value that expression comprises the receiving digital signals part quality of a QPCH code element.Also known CSI ₁Be the ratio of pilot energy and received energy, or carrier signal is to interference ratio, and the pilot energy E that is associated with first code element by handle _Pilot1Divided by with the received signal I of the receiving digital signals part correlation connection that contains a QPCH code element _O1Gross energy and calculate.Then, control is delivered to the first deletion-inspection step 106.

In the first deletion-inspection step 106, CSI ₁=E _Pilot1/ I _O1With the predetermined deletion threshold T that is stored in the QPCH memory 80 _ErasureCompare.If CSI ₁Less than T _Erasure, then show deletion.When showing deletion for first code element, determine that the mass deficiency of the signal environment of received signal process is measured (D to rely on first ₁) value, to judge whether to receive and to handle upcoming basic paging channel.

In this specific embodiment, predetermined deletion threshold T _ErasureBe stored in the QPCH memory 80 that is associated with paging detector 42.On the other hand, deletion threshold T _ErasureCan be provided by the bus (not shown) by controller 56, and dynamically calculate according to the signal environment that changes, the signal environment of variation is represented by the pilot energy of pilot energy counting circuit 70 outputs.

When in the first deletion-inspection step 106, showing deletion, control is delivered to the second code element step 108.Otherwise, control is delivered to first demodulation step 110.

In first demodulation step 110, demodulator 72 calculates fast paging code element QP according to watch (1) ₁, and QP ₁Offer QPCH combiner 40.70 pilot energy (E that are associated with a QPCH code element of pilot energy counting circuit _Pilot1) offer QPCH combiner 40.Then, QPCH combiner 40 calculates first according to formula (12) and measures D ₁Then, control is delivered to noise power step 112.

In noise power step 112, the QPCH combiner 40 in the noise power step 112 is for can be used for calculating the corresponding noise power estimation values sigma that is associated with a QPCH code element later on ₁ ²Available multi-path signal-component, QPCH combiner 40 calculates and storage (in QPCH memory 80) noise estimation values sigma _1K ²Then, control is delivered to first on-off and checks step 114.

Check in the step 114, in first on-off the first decision metric D ₁With the first on-off threshold T _1/0Compare.If D ₁Less than T _1/0, then control is delivered to sleep step 116, in this step, make transceiver 44 outages, and make mobile radio station 26 place sleep state.Because QPCH is the OOK modulation, if D ₁Less than T _1/0, then connect considering corresponding to the energy shortage of the QPCH time slot of first code element part, so be to consider to turn-off, this hints that a QPCH code element represents that upcoming whole paging does not need to separate to be in harmonious proportion and handle.If D ₁Greater than T _1/0, then consider to connect a QPCH code element, this theory hint according to the present invention should be analyzed the 2nd QPCH code element of time slot, should receive and handle upcoming at once whole calling on basic paging channel with checking.If D ₁Greater than T _1/0, then control is delivered to the second code element step 108, pass through a QPCH code element and a D with checking ₁The connection indication of expression.

In the second code element step 108, for the 2nd QPCH code element execution in step 102,104 and 112, to produce QP corresponding to the QPCH time slot of the QPCH paging of received signal ₂(seeing Table (1)) and E _Pilot2The value of (seeing formula (3)).Then, QPCH combiner 40 is by using QP ₂Divided by E _Pilot2And calculating CSI ₂Then, control is delivered to the second deletion-inspection step 118.

In the second deletion-inspection step 118, CSI ₂With the deletion threshold T _ErasureCompare described deletion threshold T _ErasureMay be different with the corresponding deletion threshold value of use in the first deletion-inspection step 106, but scope of the present invention do not departed from.If CSI ₂Less than T _Erasure, consider that then QPCH connects, and control is delivered to initial paging step 120, in this step, receive and handle upcoming basic paging channel according to the IS-95 telecommunication standard.Otherwise, control is delivered to second demodulation step 122.

CSI ₁, CSI ₂And D ₁Compare with it respectively such as the deletion threshold T _ErasureWith the on-off threshold T _1/0And so on the explicit value of various threshold values be special-purpose, those skilled in the art that can determine, to meet the requirement of given application.

In second demodulation step 122, according to the control command that receives from QPCH detector 42, by the 2nd QPCH code element of QPCH combiner 40 processing QPCH time slots, to produce demodulation code element D according to formula (13).QPCH combiner 40 use by step 112 and 108 and the Noise Variance Estimation value exported of formula (4) and (5) calculate corresponding noise power estimated value, described noise power estimated value is used for according to formula (13) calculating D.Those skilled in the art that will appreciate that, can or pass through independent controller 56 by controller 56 and QPCH combiner 40 and replace QPCH combiners 40, this control command is provided, and does not depart from scope of the present invention.

Then, control is delivered to second on-off checks step 124, in this step, the logical-disconnected threshold T of D and combination _0/1combinedCompare.If D is greater than the on-off threshold T of combination _0/1combined, consider that then QPCH connects, and control is delivered to basic paging step 120, in this step, receive and handle the upcoming whole paging on basic paging channel.Otherwise, control is delivered to sleep step 116, in this step, make mobile radio station 26 be in sleep state.Note, resemble to handle and handle the 2nd QPCH code element the QPCH code element, and the pilot filter 68 of Fig. 2 does not carry out filtering to the QPCH code element.

By using noise estimation value to analyze quick paging channel, the present invention allows preferable diversity portfolio premium, and the result with respect to the system and method that was used to check upcoming basic paging in the past, produces preferable total basic paging and detects performance.

Therefore, the present invention has been described here with reference to the specific embodiment of application-specific.Be familiar with present technique field basic fundamental and will appreciate that with the personnel that contact theory of the present invention modification in addition, application and embodiment are within the scope of the invention.

Therefore plan any He all this application, modification and the embodiment that are included in the scope of the present invention by appending claims.

Claims (21)

1. a system is used for using effectively the quick paging channel signal to judge at the wireless communication system that uses quick paging channel and basic paging channel and has upcoming basic paging channel signal, it is characterized in that this system comprises:

First device is used for selectively handling according to first critical parameter and/or second critical parameter first quick paging channel symbols and/or second quick paging channel symbols of received signal, and provides first indication according to it;

Second device is used for handling described first quick paging channel symbols according to described first indication, and provides second indication according to it, and whether the described second indication expression receives and handle upcoming basic paging channel signal; And

The 3rd device is used for handling described second quick paging channel symbols according to described first indication and described second indication, and provides the 3rd indication according to it, and whether described the 3rd indication expression receives and handle described basic paging channel.

2. the system as claimed in claim 1 is characterized in that, further comprises the 4th device, is used for selectively using when the described second indication expression does not receive and handle described upcoming basic paging channel described the 3rd device.

3. system as claimed in claim 2, it is characterized in that, described system is installed in the mobile radio station, when paging sends to described mobile radio station when representing to exist upcoming calling by described wireless communication system, be convenient between described mobile radio station and described wireless communication system, successfully set up traffic channel.

4. system as claimed in claim 2 is characterized in that, described first critical parameter is represented the signal environment quality of described received signal process.

5. system as claimed in claim 4 is characterized in that, describes the described first critical parameter CSI by following formula ₁:

${\mathrm{CSI}}_1=\frac{E_{\mathrm{pilot}1}}{{\hat{I}}_{o1}},$

Wherein, E _Pilot1The combined pilot energy of the described pilot signal of a part that expression is associated with described first quick paging channel symbols, and  _O1The gross energy of the described received signal of a part that expression is associated with described first quick paging channel symbols.

6. system as claimed in claim 5 is characterized in that, following formula is described the second critical parameter D ₁:

$D_1=\frac{Q{P}_1}{E_{\mathrm{pilot}1}},$

Wherein, QP ₁Be dot product, vector product or their combination of the estimated value of described first code element and the described pilot signal that is associated with it.

7. system as claimed in claim 6, it is characterized in that, described first device further comprises a kind of device, be used for described first critical parameter and deletion threshold value are compared, and by the described first indication expression, according to described comparison with by described first indication,, handle first quick paging channel symbols when described first critical parameter during greater than predetermined deletion threshold value.

8. system as claimed in claim 7, it is characterized in that, described first device further comprises a kind of device, is used for by the described first indication expression handling the second fast paging code element rather than the first fast paging code element at once when described first critical parameter during less than described deletion threshold value.

9. system as claimed in claim 8, it is characterized in that, described second device comprises a kind of device, be used for the described second critical parameter D1 and first logical-disconnected threshold value are compared, and by the described second indication expression, for upcoming paging, do not receive and handle described upcoming paging channel.

10. system as claimed in claim 9 is characterized in that, described second device further comprises a kind of according to described second indication, selectively makes described system enter dormant device.

11. system as claimed in claim 10, it is characterized in that, described second device comprises a kind of device, be used for by the second indication expression when the described first indication expression does not receive and handle the first fast paging code element and when described second critical parameter during, handling second quick paging channel symbols greater than the described leading to-threshold value of breaking.

12. system as claimed in claim 11 is characterized in that, described the 3rd device comprises a kind of device that comes computational discrimination parameter D according to described indicating device:

$D=\frac{\frac{Q{P}_1}{{\mathrm{\&sigma;}}_1^2}+\frac{{\mathrm{QP}}_2}{{\mathrm{\&sigma;}}_2^2}}{\frac{E_{\mathrm{pilot}1}}{{\mathrm{\&sigma;}}_1^2}+\frac{E_{\mathrm{pilot}2}}{{\mathrm{\&sigma;}}_2^2}},$

Wherein, σ ₁ ²The noise power that expression is associated with the described received signal of a part that contains first quick paging channel symbols; σ ₂ ²The noise power that expression is associated with the described received signal of a part that contains second quick paging channel symbols; QP ₂Be described second quick paging channel symbols signal component and with described pilot signal that described second quick paging channel symbols is associated between dot product, vector product or their combination; And E _Pilot2Total pilot energy that expression is associated with the second pilot channel code element, the described second pilot channel code element is associated with described second quick paging channel symbols.

13. system as claimed in claim 12, it is characterized in that, described the 3rd device further comprises a kind of device, be used for D and second logical-disconnected threshold value are compared, and by described the 3rd indication expression when D greater than described second logical-during the threshold value of breaking, handle described upcoming basic paging channel, and by described the 3rd indication expression when D be similar to less than described second logical-during the threshold value of breaking, do not handle described upcoming basic paging channel.

14. the fast paging signal that a basis is associated with quick paging channel indicates whether to receive and handle the system of the upcoming paging on the basic paging channel, it is characterized in that it comprises:

First device is used for calculating first parameter, the signal environment quality of the described system works of described first parametric representation according to the received signal that contains described fast paging signal and pilot signal;

Second installs, and is used for selectively handling according to described first parameter first code element of described fast paging signal, and provides second parameter, the signal strength signal intensity of the described fast paging signal of described second parametric representation according to it;

The 3rd device, being used for according to described first parameter and described second parameter decision is second code element of handling described quick paging channel signal, also provides first indication, expression is not handled described basic paging channel to upcoming paging; And

The 4th device, be used for selectively handling described second code element of described quick paging channel signal according to the 3rd device, described the 4th device comprises a kind of device, be used to use the noise power estimated value that is associated with the described first fast paging code element and the described second fast paging code element, and the energy of the energy of described pilot signal and the described quick paging channel signal that is associated with the described second fast paging code element provides second indication, and whether expression handles described paging channel for described upcoming paging.

15. system as claimed in claim 14 is characterized in that, described first parameter comprises pilot signal to interference ratio, and this is the ratio of the energy of described pilot signal to the total signal energy of described received signal.

16. system as claimed in claim 15 is characterized in that, described quick paging channel signal comprises time slot, and described time slot has described first quick paging channel symbols and described second quick paging channel symbols.

17. system as claimed in claim 15 is characterized in that, described second device is used for judging that the described intensity of the described received signal of described second parameter is the relative signal intensity of described paging signal with respect to the signal strength signal intensity of described pilot signal.

18. system as claimed in claim 17 is characterized in that, stipulates described second parameter by following formula:

$D_1=\frac{{\mathrm{QP}}_1}{E_{\mathrm{pilot}1}},$

Wherein, QP ₁It is the demodulation code element that comprises fast paging signal and pilot signal component; And E _Pilot1Expression is associated with the described pilot signal that makes up on all available multipaths, and the energy that is associated with described first quick paging channel symbols.

19. system as claimed in claim 18, it is characterized in that described noise power estimated value comprises first noise power estimated value that is associated with the first fast paging code element of described fast paging signal and the second noise power estimated value that is associated with the described second fast paging code element of seeking channel soon.

20. system as claimed in claim 14, it is characterized in that, described the 4th device comprises a kind of device, is used for decision statistic and predetermined composite door limit value are compared, and represents whether handle described upcoming basic paging channel for described paging according to described comparative result.

21. system as claimed in claim 20 is characterized in that, stipulates described decision statistic by following formula:

$D=\frac{\frac{Q{P}_1}{{\mathrm{\&sigma;}}_1^2}+\frac{{\mathrm{QP}}_2}{{\mathrm{\&sigma;}}_2^2}}{\frac{E_{\mathrm{pilot}1}}{{\mathrm{\&sigma;}}_1^2}+\frac{E_{\mathrm{pilot}2}}{{\mathrm{\&sigma;}}_2^2}},$

Wherein, σ ₁ ²The noise power that expression is associated with the first of the described received signal that contains first quick paging channel symbols; σ ₂ ²The noise power that expression is associated with the second portion of the described received signal that contains second quick paging channel symbols; QP ₁Be be associated dot product, vector product or their combination of estimated value of part of described first quick paging channel symbols and described pilot signal; QP ₂Be be associated dot product, vector product or their combination of estimated value of part of described second quick paging channel symbols and described pilot signal; E _Pilot1It is the energy of the described first of described pilot signal; And E _Pilot2It is the energy of the described second portion of described pilot signal.

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