CN101026389B - Mobile terminal and its processing method - Google Patents

Abstract

The mobile terminal includes following units: channel estimation unit in use for carrying out channel estimation for signal from network side to obtain signal pulse response, which is sent to power calculation unit; power calculation unit in use for receiving signal pulse response, and obtaining signal power and noise power by calculation according to prearranged algorithm; thereinto, zero signal detection unit included is in use for obtaining noise power through calculating by power calculation unit to determine noise threshold; comparing signal power calculated with the noise threshold, and based on the calculated result to determine whether the signal from network side is a zero signal or not. When determining there is non zero signal sent from network side, the invention just carry out relevant respond operation. The invention raises degree of accuracy to execute respond operation, prevents error operation, and reduces unnecessary operation quantity.

Description

A kind of portable terminal and processing method thereof

Technical field

The present invention relates to communication technical field, relate in particular to a kind of portable terminal and processing method thereof.

Background technology

The 3-G (Generation Three mobile communication system) TD SDMA (Time Division-Synchronous CodeDivision Multiple, TD-SCDMA) physical channel of system has unique frame structure, and Fig. 1 is a TD-SCDMA wireless sub-frame structure chart.As shown in Figure 1, each subframe is 7 conventional time slots (TS0～TS6) form with 3 special time slots of 675 μ s by length.On time division multiple access (TDMA) channel, the information format in time slot becomes burst (Burst).The protection interval (GP) that the burst that the TD-SCDMA system adopts is 16chip by two length intermediate code (midamble) that to be respectively the data block of 352 chips (chip), length be 144chip and length is formed.Wherein, the intermediate code in the subframe is to be that the basic midamble code cyclic shift of 128chip produces by length.Different user adopts identical basic midamble code in the same time slot in same sub-district.The burst structure of TD-SCDMA system provides the possibility of physical layer control signaling on the control plane.These physical layers control signalings comprise the synthetic indication of transformat (TFCI), transmitting power control (Transmit Power Control, TPC) and simultaneous bias (Synchronization Shift, SS).As shown in Figure 2, physical layer control signaling structure figure when sending SS and TPC in the TD-SCDMA system.In same sub-district, for each user, the synthetic indication information of transformat sends once in every 10ms radio frames, and transmitting power control and synchronization shift information then send once in every 5ms wireless sub-frame.Because the transmitting power of intermediate code equates with the reflection power of data division, and do not need spread spectrum and scrambling, so, be usually used in carrying out channel estimating, and utilize channel estimation results to measure accordingly and processing such as signal demodulation as training sequence.Wherein, measuring accordingly can (Received Signal Code Power RSCP) measures and System Frame Number observed time difference (SFN-SFN Observed Time Difference, SFN-SFN OTD) measurement etc. for received signal code power.

But, do not send signal or because received signal is very faint so that be submerged in the situation of these two kinds of zero-signals in the noise for network side reality, if the result to channel estimating does not carry out the zero-signal detection before measuring, might measure a false value, thereby the accuracy of reported result is measured in influence, cause misoperation, perhaps increase unnecessary operand.

Summary of the invention

One of purpose of the present invention is, a kind of portable terminal is provided, and can carry out zero-signal and detect before carrying out corresponding operation response according to the signal that receives after receive the signal that network side sends.

Another object of the present invention is to, a kind of processing method of portable terminal is provided, can after receive the signal that network side sends, before carrying out corresponding operation response, carry out zero-signal and detect according to the signal that receives.

Portable terminal of the present invention comprises channel estimating unit, is used for that network side is sent signal and carries out channel estimating and obtain signal pulse response, and the signal pulse response is sent to power calculation unit; Power calculation unit is used to receive described signal pulse response and calculates signal power and noise power according to predetermined algorithm; Wherein, also comprise the zero-signal detecting unit, be used for determining noise gate, and the signal power that calculates is compared with described noise gate, determine according to comparative result whether the signal that network side sends is zero-signal according to the noise power that described power calculation unit calculates.

Wherein, the predetermined algorithm that described power calculation unit adopts is, with the channel impulse response of the predetermined length channel window that to be divided into M length be N, and calculates the interior total power signal e of each channel window _CIR ⁱ, in each channel window, select P bar maximum path, and detect effective diameter according to the second predetermined criterion according to the first predetermined criterion, calculate noise power and signal power.

Wherein, described first criterion is,

$\left\{\begin{array}{c}{s}_1^i=\max (h_1^i,h_2^i,h_3^i,\·\·\·h_N^i)\\ s_2^i={\left|s_1^i\right|}^2\·{\mathrm{\κ}}_2\\ \·\\ \·\\ \·\\ s_P^i=\left(\underset{k=1}{\overset{P-1}{\mathrm{\Σ}}}{\left|s_{\mathrm{\κ}}^i\right|}^2\right)\·{\mathrm{\κ}}_P\end{array},i=1,\·\·\·,M\right.$

Wherein, h ₁ ⁱ, h ₂ ⁱ, h ₃ ⁱ... h _N ⁱIt is each channel impulse response in i the channel window; s _k ⁱBe the signal power of k bar maximum path in i the channel window, k=1 ..., p; κ ₁, κ ₂..., κ _P, be system's preset parameters;

Described second criterion is,

$P_{\mathrm{noise}}^i=e_{\mathrm{CIR}}^i-\underset{k=1}{\overset{P}{\mathrm{\Σ}}}{\left|s_k^i\right|}^2,i=1,\·\·\·,M$

$h_n^i=\left\{\begin{array}{c}{h}_n^i,{\left|h_n^i\right|}^2\&GreaterEqual;F_{\mathrm{factor}}\&times;P_{\mathrm{noise}}^i\\ 0,{\left|h_n^i\right|}^2<F_{\mathrm{factor}}\&times;P_{\mathrm{noise}}^i\end{array},i=1,\&CenterDot;\&CenterDot;\&CenterDot;,M,n=1,\&CenterDot;\&CenterDot;\&CenterDot;,N\right.$

Wherein: parameter F _FoctorPreestablish P by system _Noise ⁱIt is the initial noise power in i the channel window.

Described zero-signal detecting unit during greater than described noise gate, determines that signal is a non-zero signal in described signal power; When described signal power is less than or equal to described noise gate, determine that the signal that network side sends is a zero-signal.

Described zero-signal detecting unit can be further used for when definite signal is non-zero signal, and described non-zero signal is sent in the corresponding operation response device; When definite signal is zero-signal, ignore the signal that network side sends, described non-zero signal is not sent in the corresponding operation response device.

Wherein, corresponding operation response device can comprise: System Frame Number observed time difference measurements device, received signal code power measurement device, automatic gain control equipment, simultaneous bias device, emission power control device and the portable terminal response paging equipment when idle pulley.

The processing method of portable terminal of the present invention comprises the following steps:

Step 101: portable terminal carries out channel estimating at the signal that sends according to the network side that receives, and obtains channel impulse response, and calculates signal power and noise power according to predetermined algorithm according to channel impulse response;

Step 102: determine noise gate according to the described noise power that calculates, and the described signal power that will calculate compares with described noise gate, determine whether the signal that network side sends is zero-signal.

Wherein, in described step 101, calculate signal power and noise power, comprise the following steps: according to predetermined algorithm

Step 11: utilize intermediate code to carry out channel estimating,, and obtain total power signal in each channel window with the channel impulse response of the predetermined length channel window that to be divided into M length be N;

Step 12: in each channel window, select P bar maximum path, detect effective diameter according to the second predetermined criterion, and calculate noise power and signal power according to the first predetermined criterion.

Wherein, described first criterion is,

$\left\{\begin{array}{c}{s}_1^i=\max (h_1^i,h_2^i,h_3^i,\&CenterDot;\&CenterDot;\&CenterDot;h_N^i)\\ s_2^i={\left|s_1^i\right|}^2\&CenterDot;{\mathrm{\&kappa;}}_2\\ \&CenterDot;\\ \&CenterDot;\\ \&CenterDot;\\ s_P^i=\left(\underset{k=1}{\overset{P-1}{\mathrm{\&Sigma;}}}{\left|s_{\mathrm{\&kappa;}}^i\right|}^2\right)\&CenterDot;{\mathrm{\&kappa;}}_P\end{array},i=1,\&CenterDot;\&CenterDot;\&CenterDot;,M\right.$

Wherein, h ₁ ⁱ, h ₂ ⁱ, h ₃ ⁱ... h _N ⁱIt is each channel impulse response in i the channel window; s _k ⁱBe the signal power of k bar maximum path in i the channel window, k=1 ..., p; κ ₁, κ ₂..., κ _P, be system's preset parameters;

Described second criterion is,

$P_{\mathrm{noise}}^i=e_{\mathrm{CIR}}^i-\underset{k=1}{\overset{P}{\mathrm{\&Sigma;}}}{\left|s_k^i\right|}^2,i=1,\&CenterDot;\&CenterDot;\&CenterDot;,M$

$h_n^i=\left\{\begin{array}{c}{h}_n^i,{\left|h_n^i\right|}^2\&GreaterEqual;F_{\mathrm{factor}}\&times;P_{\mathrm{noise}}^i\\ 0,{\left|h_n^i\right|}^2<F_{\mathrm{factor}}\&times;P_{\mathrm{noise}}^i\end{array},i=1,\&CenterDot;\&CenterDot;\&CenterDot;,M,n=1,\&CenterDot;\&CenterDot;\&CenterDot;,N\right.$

Wherein: parameter F _FactorPreestablish P by system _Noise ⁱIt is the initial noise power in i the channel window.

In addition, in described step 102, the described signal power that calculates is compared with described noise gate, comprise the following steps:

When described signal power during, determine that the signal that network side sends is a non-zero signal greater than described noise gate; When described signal power is less than or equal to described noise gate, determine that the signal that network side sends is a zero-signal.

After described step 102, may further include the following step:

Step 103: when determining that signal that network side sends is non-zero signal, carry out corresponding operation response; When being defined as non-zero signal, do not carry out corresponding operation response.

Wherein, corresponding operation response comprises: observed time difference measurements, received signal code power measurement, automatic gain control, simultaneous bias, transmitting power control and the response paging of portable terminal when idle pulley between System Frame Number.

Beneficial effect of the present invention: according to portable terminal of the present invention and processing method thereof, carry out channel estimating by the signal that network side is sent and obtain channel impulse response, and calculate signal power and noise power according to channel impulse response according to predetermined algorithm, and then definite noise gate, compare by signal power and noise gate, determine whether the signal that network side sends is zero-signal, only when determining to have non-zero signal, just carry out corresponding operation response, otherwise, do not carry out corresponding operation response, thereby improve the accuracy of carrying out corresponding operation response, prevent misoperation, and reduce unnecessary operand.

Description of drawings

Fig. 1 is a TD-SCDMA wireless sub-frame structure chart;

Fig. 2 is physical layer control signaling structure figure when sending SS and TPC in the TD-SCDMA system;

Fig. 3 is the structural representation of portable terminal of the present invention;

Fig. 4 is the channel impulse response schematic diagram of the process channel estimating among the embodiment;

Fig. 5 is the channel impulse response schematic diagram of the process noise reduction process among the embodiment;

Fig. 6 is used for the schematic diagram of operation response for the zero-signal detecting unit of portable terminal of the present invention;

Fig. 7 is the process flow figure of portable terminal of the present invention.

Embodiment

Below, 3～7 describe portable terminal of the present invention and processing method thereof in detail in conjunction with the accompanying drawings.

Basic thought of the present invention is: receive the downstream signal of network side at portable terminal after, carry out respective response operation (for example PSCP measures and SFN-SFN OTD measures) before according to received signal, at first judge whether to exist zero-signal, and then carry out corresponding operation response, avoid causing misoperation because of the falseness value.

As shown in Figure 3, portable terminal of the present invention comprises: channel estimating unit 1, power calculation unit 2 and zero-signal detecting unit 3.

Wherein: channel estimating unit 1 is used for that network side is sent signal and carries out channel estimating and obtain signal pulse response, and the signal pulse response is sent to power calculation unit 2; Power calculation unit 2 is used for received signal impulse response and calculates signal power and noise power according to predetermined algorithm, then result of calculation is exported to zero-signal detecting unit 3.Zero-signal detecting unit 3 is used for determining noise gate according to the noise power that obtains, and the described signal power that will calculate compares with described noise gate, determines whether to exist zero-signal according to comparative result.

Particularly, based on as previously mentioned,, so in channel estimating unit 1, can adopt intermediate code to carry out channel estimating because the transmitting power of intermediate code equates with the reflection power of data division, and do not need spread spectrum and scrambling.Intermediate code can be expressed as:

Y＝GH+n

Wherein, G represents the circular matrix of basic midamble code; H represents channel matrix; N represents white Gaussian noise.Therefore, the result who obtains channel estimating is:

H＝G ^-1Y-G ^-1n

In addition, in power calculation unit 2, signal calculated power and noise power according to predetermined algorithm be, the channel window that at first channel impulse response of predetermined length to be divided into M length be N, calculate the gross power in each channel window, in each channel window, select P bar maximum path signal power (s according to the first predetermined criterion ₁ ⁱ, s ₂ ⁱ, s _P ⁱ, i=1 ... M), and detect effective diameter, calculate noise power and signal power then according to the second predetermined criterion.With intermediate code under the DEFAULT allocation model.The number K cell=8 of available Midamble sign indicating number phase shift is an example in this sub-district, as shown in Figure 4, and the channel impulse response schematic diagram of the process channel estimating among the embodiment.

Wherein, in power calculation unit 2, the gross power in calculating each channel window is calculated by following formula:

${e^i}_{\mathrm{CIR}}=\underset{k=1}{\overset{N}{\mathrm{\&Sigma;}}}{\left|h_k^i\right|}^2,i=1,\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;M$

In addition, first criterion is:

$\left\{\begin{array}{c}{s}_1^i=\max (h_1^i,h_2^i,h_3^i,\&CenterDot;\&CenterDot;\&CenterDot;h_N^i)\\ s_2^i={\left|s_1^i\right|}^2\&CenterDot;{\mathrm{\&kappa;}}_2\\ \&CenterDot;\\ \&CenterDot;\\ \&CenterDot;\\ s_P^i=\left(\underset{k=1}{\overset{P-1}{\mathrm{\&Sigma;}}}{\left|s_{\mathrm{\&kappa;}}^i\right|}^2\right)\&CenterDot;{\mathrm{\&kappa;}}_P\end{array},i=1,\&CenterDot;\&CenterDot;\&CenterDot;,M\right.$

Wherein, h ₁ ⁱ, h ₂ ⁱ, h ₂ ⁱ... h _N ⁱIt is each channel impulse response in i the channel window; s _k ⁱBe the signal power of k bar maximum path in i the channel window, k=1 ..., p; κ ₁, κ ₂..., κ _P, be system's preset parameters.

Second criterion is:

$P_{\mathrm{noise}}^i=e_{\mathrm{CIR}}^i-\underset{k=1}{\overset{P}{\mathrm{\&Sigma;}}}{\left|s_k^i\right|}^2,i=1,\&CenterDot;\&CenterDot;\&CenterDot;,M$

$h_n^i=\left\{\begin{array}{c}{h}_n^i,{\left|h_n^i\right|}^2\&GreaterEqual;F_{\mathrm{factor}}\&times;P_{\mathrm{noise}}^i\\ 0,{\left|h_n^i\right|}^2<F_{\mathrm{factor}}\&times;P_{\mathrm{noise}}^i\end{array},i=1,\&CenterDot;\&CenterDot;\&CenterDot;,M,n=1,\&CenterDot;\&CenterDot;\&CenterDot;,N\right.$

Wherein: parameter F _FactorPreestablish P by system _Noise ⁱIt is the initial noise power in i the channel window.As shown in Figure 5, the channel impulse response schematic diagram of the process noise reduction process among the embodiment.

Obtain noise power σ at last _n ²With signal power S _m ², expression formula is as follows:

Wherein, S _NumThe sum of representing effective diameter in M the channel window.Wherein, S _NumThe sum of representing effective diameter in M the channel window.

Zero-signal detecting unit 3 is at described signal power S _m ²Greater than described noise gate λ σ _n ²The time, determine that signal is a non-zero signal; When described signal power is less than or equal to described noise gate, determine that signal is a zero-signal.

Wherein, coefficient lambda is determined according to actual emulation by system.

In addition, zero-signal detecting unit 3 is further used for when determining to have non-zero signal, non-zero signal is transferred to the device that is used for carrying out corresponding operation response.As shown in Figure 6, the schematic diagram that is used for operation response for the zero-signal detecting unit of portable terminal of the present invention.

Wherein, the device of carrying out corresponding operation response comprises: System Frame Number observed time difference (SFN-SFNOTD) measurement mechanism, received signal code power (RSCP) measurement mechanism, automatic gain control (AGC) device, simultaneous bias (SS) device and transmitting power control (TPC) device and portable terminal respond paging equipment when idle (Idle) pattern.Here each cited operation response is prior art, and the present invention is not described in detail.

More than be the description that portable terminal of the present invention is carried out, below, describe the processing method of portable terminal of the present invention in detail, as shown in Figure 7, the processing method of portable terminal of the present invention comprises the following steps:

Step 101: portable terminal carries out channel estimating and obtains channel impulse response, and calculate signal power and noise power according to predetermined algorithm according to channel impulse response when receiving the signal that network side sends;

Step 102: determine noise gate according to signal power that calculates and noise power, and determine according to the noise gate of determining whether the signal that network side sends exists zero-signal.

Particularly, step 101 comprises the following steps:

Step 11: utilize intermediate code to carry out channel estimating, with the channel impulse response of the predetermined length channel window that to be divided into M length be N, and obtain total power signal in each channel window, each total power signal is calculated by following formula: $e_{\mathrm{CIR}}^i=\underset{k=1}{\overset{N}{\mathrm{\&Sigma;}}}{\left|h_k^i\right|}^2,i=1,\&CenterDot;\&CenterDot;\&CenterDot;,M.$

Wherein, in the step 11, utilize intermediate code to obtain channel estimation results to be: H=G ^-1Y-G ^-1N, wherein, G represents the circular matrix of basic midamble code; H represents channel matrix; N represents white Gaussian noise.Kcell=8 under the DEFAULT allocation model is an example with intermediate code, as shown in Figure 4, and the channel impulse response schematic diagram of the process channel estimating among the embodiment.

Step 12: in each channel window, select P bar maximum path signal power (s according to the first predetermined criterion ₁ ⁱ, s ₂ ⁱ..., s _P ⁱ, i=1 ... M).

Wherein, the first predetermined criterion in the step 12 is:

$\left\{\begin{array}{c}{s}_1^i=\max (h_1^i,h_2^i,h_3^i,\&CenterDot;\&CenterDot;\&CenterDot;h_N^i)\\ s_2^i={\left|s_1^i\right|}^2\&CenterDot;{\mathrm{\&kappa;}}_2\\ \&CenterDot;\\ \&CenterDot;\\ \&CenterDot;\\ s_P^i=\left(\underset{k=1}{\overset{P-1}{\mathrm{\&Sigma;}}}{\left|s_{\mathrm{\&kappa;}}^i\right|}^2\right)\&CenterDot;{\mathrm{\&kappa;}}_P\end{array},i=1,\&CenterDot;\&CenterDot;\&CenterDot;,M\right.$

Wherein, h ₁ ⁱ, h ₂ ⁱ, h ₃ ⁱ... h _N ⁱIt is each channel impulse response in i the channel window; s _k ⁱBe the signal power of k bar maximum path in i the channel window, k=1 ..., p; κ ₁, κ ₂..., κ _P, be system's preset parameters.

Step 13: detect effective diameter according to the second predetermined criterion.

Wherein, in the step 13, the second predetermined criterion is:

$P_{\mathrm{noise}}^i=e_{\mathrm{CIR}}^i-\underset{k=1}{\overset{P}{\mathrm{\&Sigma;}}}{\left|s_k^i\right|}^2,i=1,\&CenterDot;\&CenterDot;\&CenterDot;,M$

$h_n^i=\left\{\begin{array}{c}{h}_n^i,{\left|h_n^i\right|}^2\&GreaterEqual;F_{\mathrm{factor}}\&times;P_{\mathrm{noise}}^i\\ 0,{\left|h_n^i\right|}^2<F_{\mathrm{factor}}\&times;P_{\mathrm{noise}}^i\end{array},i=1,\&CenterDot;\&CenterDot;\&CenterDot;,M,n=1,\&CenterDot;\&CenterDot;\&CenterDot;,N\right.$

Wherein: parameter F _FactorPreestablish P by system _Noise ⁱIt is the initial noise power in i the channel window.As shown in Figure 4, for falling the channel impulse response schematic diagram after the hot-tempered processing.

Step 14: calculate noise power σ according to step 13 _n ²Signal power S _m ²:

Wherein, S _NumThe sum of representing effective diameter in M the channel window.

Wherein, in the step 102, determine noise gate λ σ according to noise power _n ², and with signal power S _m ²With noise gate λ σ _n ²Compare, during greater than noise gate, determine that signal exists, and is non-zero signal in signal power; When signal power is less than or equal to noise gate, determine that signal does not exist, and is zero-signal.

Wherein, coefficient lambda is determined according to actual emulation by system.

According to as mentioned above, can be after portable terminal receives the downstream signal of network side, before the operation of received signal execution respective response, judge and whether have zero-signal, but, also need to utilize the judged result decision that obtains whether to carry out corresponding operation response, to avoid causing misoperation because of the falseness value.

Therefore, based on as mentioned above, after step 102, can comprise the following steps:

Step 103: when being defined as zero-signal, do not carry out corresponding operation response; When being defined as non-zero signal, carry out corresponding operation response.

Wherein: in the step 103, corresponding operation response comprises: System Frame Number observed time difference (SFN-SFN OTD) measurement, received signal code power measurement (RSCP), automatic gain control (AGC), simultaneous bias (SS) and transmitting power control (TPC) and portable terminal respond paging when idle (Idle) pattern.

In sum, portable terminal of the present invention and processing method thereof, when receiving the signal of network side transmission, before carrying out corresponding operation response according to the signal that receives, at first carry out channel estimating and obtain channel impulse response by the signal that network side is sent, and calculate signal power and noise power according to channel impulse response according to predetermined algorithm, and then definite noise gate, compare by signal power and noise gate then, determine whether the signal that network side sends is zero-signal, only when determining to have non-zero signal, just carry out corresponding operation response, otherwise, do not carry out corresponding operation response, thereby improve the accuracy of carrying out corresponding operation response, prevent misoperation, and reduce unnecessary operand.

Through the above description of the embodiments, those skilled in the art can be well understood to the application of the present invention in the TD-SCDMA system, and still, the present invention is not applied to can also be applied to other wireless communication systems in the TD-SCDMA system with not limiting to.In addition, the algorithm that is used to calculate signal power and noise power is not limited to foregoing description, can also be other algorithms of the prior art.

More than; be in order to make those of ordinary skills understand the present invention; and to detailed description that the present invention carried out; but can expect; in the scope that does not break away from claim of the present invention and contained, can also make other variation and modification, these variations and revising all in protection scope of the present invention.

Claims (10)

1. a portable terminal comprises channel estimating unit, is used for that network side is sent signal and carries out channel estimating and obtain signal pulse response, and the signal pulse response is sent to power calculation unit;

Power calculation unit is used to receive described signal pulse response and calculates signal power and noise power according to predetermined algorithm,

It is characterized in that, also comprise:

The zero-signal detecting unit, be used for determining noise gate according to the noise power that described power calculation unit calculates, and the signal power that calculates compared with described noise gate, determine according to comparative result whether the signal that network side sends is zero-signal;

And when definite signal is non-zero signal, described non-zero signal is sent in the corresponding operation response device.

2. portable terminal as claimed in claim 1 is characterized in that, the predetermined algorithm that described power calculation unit adopts is, with the channel impulse response of the predetermined length channel window that to be divided into M length be N, and calculates the interior total power signal of each channel window

In each channel window, select P bar maximum path, and detect effective diameter, calculate noise power and signal power according to the second predetermined criterion according to the first predetermined criterion;

Wherein, described first criterion is,

$\left\{\begin{array}{c}{S}_1^i=\max (h_1^i,h_2^i,h_3^i,...h_N^i)\\ S_2^i={\left|S_1^i\right|}^2\&CenterDot;{\mathrm{\&kappa;}}_2\\ .\\ .\\ .\\ S_P^i=\left(\underset{k=1}{\overset{P-1}{\mathrm{\&Sigma;}}}{\left|S_{\mathrm{\&kappa;}}^i\right|}^2\right)\&CenterDot;{\mathrm{\&kappa;}}_P\end{array}\right.,i=1,...,M$

Wherein,

It is each channel impulse response in i the channel window;

Be the signal power of k bar maximum path in i the channel window, k=1 ..., p; κ ₁, κ ₂..., κ _P, be system's preset parameters;

Described second criterion is,

$P_{\mathrm{noise}}^i=e_{\mathrm{CIR}}^i-\underset{k=1}{\overset{P}{\mathrm{\&Sigma;}}}{\left|S_k^i\right|}^2,i=1,...,M$

$h_n^i=\left\{\begin{array}{cc}{h}_n^i,& {\left|h_n^i\right|}^2\&GreaterEqual;F_{\mathrm{factor}}\&times;P_{\mathrm{noise}}^i\\ 0,& {\left|h_n^i\right|}^2<F_{\mathrm{factor}}\&times;P_{\mathrm{noise}}^i\end{array}\right.,i=1,...,M,n=1,...,N$

Wherein: parameter F _FactorPreestablish by system,

It is the initial noise power in i the channel window.

3. portable terminal as claimed in claim 1 is characterized in that, described zero-signal detecting unit during greater than described noise gate, determines that signal is a non-zero signal in described signal power; When described signal power is less than or equal to described noise gate, determine that the signal that network side sends is a zero-signal.

4. portable terminal as claimed in claim 1 is characterized in that, described zero-signal detecting unit is further used for, and when definite signal is zero-signal, ignores the signal that network side sends, and described non-zero signal is not sent in the corresponding operation response device;

Corresponding operation response device comprises:

System Frame Number observed time difference measurements device, received signal code power measurement device, automatic gain control equipment, simultaneous bias device, emission power control device and the portable terminal response paging equipment when idle pulley.

5. portable terminal as claimed in claim 4, it is characterized in that corresponding operation response device comprises: System Frame Number observed time difference measurements device, received signal code power measurement device, automatic gain control equipment, simultaneous bias device, emission power control device and the portable terminal response paging equipment when idle pulley.

6. the processing method of a portable terminal is characterized in that, comprises the following steps:

Step 101: portable terminal carries out channel estimating at the signal that sends according to the network side that receives, and obtains channel impulse response, and calculates signal power and noise power according to predetermined algorithm according to channel impulse response;

Step 102: determine noise gate according to the described noise power that calculates, and the described signal power that will calculate compares with described noise gate, determine whether the signal that network side sends is zero-signal;

When determining that signal that network side sends is non-zero signal, carry out corresponding operation response.

7. the processing method of portable terminal as claimed in claim 6 is characterized in that, in described step 101, calculates signal power and noise power according to predetermined algorithm, comprises the following steps:

Step 11: utilize intermediate code to carry out channel estimating,, and obtain total power signal in each channel window with the channel impulse response of the predetermined length channel window that to be divided into M length be N;

Step 12: in each channel window, select P bar maximum path, detect effective diameter according to the second predetermined criterion, and calculate noise power and signal power according to the first predetermined criterion;

Wherein, described first criterion is,

$\left\{\begin{array}{c}{S}_1^i=\max (h_1^i,h_2^i,h_3^i,...h_N^i)\\ S_2^i={\left|S_1^i\right|}^2\&CenterDot;{\mathrm{\&kappa;}}_2\\ .\\ .\\ .\\ S_P^i=\left(\underset{k=1}{\overset{P-1}{\mathrm{\&Sigma;}}}{\left|S_{\mathrm{\&kappa;}}^i\right|}^2\right)\&CenterDot;{\mathrm{\&kappa;}}_P\end{array}\right.,i=1,...,M$

Wherein,

It is each channel impulse response in i the channel window;

Be the signal power of k bar maximum path in i the channel window, k=1 ..., p; κ ₁, κ ₂..., κ _P, be system's preset parameters;

Described second criterion is,

$P_{\mathrm{noise}}^i=e_{\mathrm{CIR}}^i-\underset{k=1}{\overset{P}{\mathrm{\&Sigma;}}}{\left|S_k^i\right|}^2,i=1,...,M$

$h_n^i=\left\{\begin{array}{cc}{h}_n^i,& {\left|h_n^i\right|}^2\&GreaterEqual;F_{\mathrm{factor}}\&times;P_{\mathrm{noise}}^i\\ 0,& {\left|h_n^i\right|}^2<F_{\mathrm{factor}}\&times;P_{\mathrm{noise}}^i\end{array}\right.,i=1,...,M,n=1,...,N$

Wherein: parameter F _FactorPreestablish by system, It is the initial noise power in i the channel window.

8. the processing method of portable terminal as claimed in claim 6 is characterized in that, in described step 102, the described signal power that calculates is compared with described noise gate, comprises the following steps:

When described signal power during, determine that the signal that network side sends is a non-zero signal greater than described noise gate; When described signal power is less than or equal to described noise gate, determine that the signal that network side sends is a zero-signal.

9. the processing method of portable terminal as claimed in claim 6 after described step 102, further comprises the following steps:

Step 103: when being defined as non-zero signal, do not carry out corresponding operation response.

10. the processing method of portable terminal as claimed in claim 9, it is characterized in that corresponding operation response comprises: System Frame Number observed time difference measurements, received signal code power measurement, automatic gain control, simultaneous bias, transmitting power control and the response paging of portable terminal when idle pulley.

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