CN201947449U - Mobile terminal - Google Patents

Abstract

The utility model discloses a mobile terminal comprising: a baseband chip and a radio frequency chip connected with the baseband chip through a conductor, wherein the baseband chip is used for determining the antenna receiving mode according to the index value of the current channel, transmitting a power control signal corresponding to the determined antenna receiving mode to the radio frequency chip through the conductor, and adjusting the self baseband receiving mode corresponding to the determined antenna receiving mode; and the radio frequency chip is used for power supply control on two receiving branches included by self according to the received power control signal. The scheme provided by the embodiment reduces the power consumption of the mobile terminal and prolongs the work time of the mobile terminal.

Description

A kind of portable terminal

Technical field

The utility model relates to wireless communication technology field, relates in particular to a kind of portable terminal.

Background technology

Unfavorable factor such as change when wireless communications environment exists multipath fading, Doppler frequency shift and channel quick, diversity technique are meant that system can provide the copy of signal transmitted in the process of communication, make that receiving function obtains to judge more accurately and receive.

The fast sign indicating number of spatial frequency SFBC technology is a kind of diversity technique of the prior art, be to launch from two antennas behind the same information via orthogonal coding, two paths of signals is owing to have orthogonality, just the two independent signal can be distinguished at receiving terminal, only need do simple linear process just can obtain diversity gain.

In the SFBC scheme, base station and portable terminal respectively dispose 2 antennas and are used to adopt the SFBC technology to carry out the signal transmission, Figure 1 shows that the schematic diagram that signal sends and receives.In base station side,, suppose that the symbols streams of input SFBC encoder is s for the SFBC system of two transmitting antennas ₁, s ₂, then transmit s respectively on the 1st subcarrier of transmitting antenna 1 and transmitting antenna 2 ₁With s ₂, and transmission-s respectively on the 2nd subcarrier of transmitting antenna 1 and transmitting antenna 2 ₂ ^*With s ₁ ^*, wherein, s ₁ ^*Be s ₁Conjugation ,-s ₂ ^*Be s ₂The conjugation negate.Promptly transmit into

The symbol that each group is such is formed code word.

At mobile terminal side is that two reception antennas receive, so channel matrix is:

H wherein _{I, j}For obeying the channel fading factor that Rayleigh distributes, i=1,2; J=1,2.

Two sub-carrier signals that two reception antennas receive are:

$\left(\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="r"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">r</figure-callout>}}_{\mathrm{1,1}}\\ {\mathrm{<figure-callout\; id="1"\; label="r"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">r</figure-callout>}}_{\mathrm{1,2}}\\ {\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">r</figure-callout>}}_{\mathrm{2,1}}\\ {\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">\; <figure-callout\; id="2"\; label="r"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">r</figure-callout>\; </figure-callout>}}_{\mathrm{2,2}}\end{array}\right)=\left(\begin{array}{c}{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,1}}{\mathrm{<figure-callout\; id="1"\; label="s"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">s</figure-callout>}}_1+{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{2,1}}{\mathrm{<figure-callout\; id="2"\; label="s"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">s</figure-callout>}}_2+{\mathrm{<figure-callout\; id="1"\; label="n"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_{\mathrm{1,1}}\\ {\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,2}}{\mathrm{<figure-callout\; id="1"\; label="s"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">s</figure-callout>}}_1+{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{2,2}}{\mathrm{<figure-callout\; id="2"\; label="s"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">s</figure-callout>}}_2+{\mathrm{<figure-callout\; id="1"\; label="n"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_{\mathrm{1,2}}\\ -{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,1}}{{\mathrm{<figure-callout\; id="2"\; label="s"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">s</figure-callout>}}_2}^{*}+{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{2,1}}{{\mathrm{<figure-callout\; id="1"\; label="s"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">s</figure-callout>}}_1}^{*}+{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_{\mathrm{2,1}}\\ -{\mathrm{<figure-callout\; id="1"\; label="h"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{1,2}}{{\mathrm{<figure-callout\; id="2"\; label="s"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">s</figure-callout>}}_2}^{*}+{\mathrm{<figure-callout\; id="2"\; label="h"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">h</figure-callout>}}_{\mathrm{2,2}}{{\mathrm{<figure-callout\; id="1"\; label="s"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">s</figure-callout>}}_1}^{*}+{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">\; <figure-callout\; id="2"\; label="n"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">n</figure-callout>\; </figure-callout>}}_{\mathrm{2,2}}\end{array}\right)$

R in the formula _{I, j}Be expressed as the signal that i subcarrier receives on j root reception antenna; N in the formula _{I, j}Be expressed as i subcarrier average on j root reception antenna and be 0 additive white Gaussian noise.

Received signal estimates channel matrix H through channel estimator, and received signal is made linear process, obtains at s ₁Demodulation after signal y ₁With at s ₂Demodulation after signal y ₂:

${\mathrm{<figure-callout\; id="1"\; label="y"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">y</figure-callout>}}_1=\underset{j=1}{\overset{2}{\mathrm{\&Sigma;}}}({h_{1,j}}^{*}{r}_{1,j}+h_{2,j}{r_{2,j}}^{*})=\underset{j=1}{\overset{2}{\mathrm{\&Sigma;}}}({\left|h_{1,j}\right|}^2+{\left|h_{2,j}\right|}^2){\mathrm{<figure-callout\; id="1"\; label="s"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">s</figure-callout>}}_1+\underset{j=1}{\overset{2}{\mathrm{\&Sigma;}}}{h_{1,j}}^{*}{\mathrm{<figure-callout\; id="1"\; label="n"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_{1,j}+\underset{j=1}{\overset{2}{\mathrm{\&Sigma;}}}{h_{2,j}}^{*}{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_{2,j}$

${\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">y</figure-callout>}}_2=\underset{j=1}{\overset{2}{\mathrm{\&Sigma;}}}({h_{2,j}}^{*}{r}_{1,j}-h_{1,j}{r_{2,j}}^{*})=\underset{j=1}{\overset{2}{\mathrm{\&Sigma;}}}({\left|h_{1,j}\right|}^2+{\left|h_{2,j}\right|}^2)s_2-\underset{j=1}{\overset{2}{\mathrm{\&Sigma;}}}{h_{1,j}}^{*}{\mathrm{<figure-callout\; id="1"\; label="n"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_{1,j}+\underset{j=1}{\overset{2}{\mathrm{\&Sigma;}}}{h_{2,j}}^{*}{\mathrm{<figure-callout\; id="2"\; label="n"\; filenames="HDA0000054200560000011.png"\; state="\{\{state\}\}">n</figure-callout>}}_{2,j}$

By following formula as seen, system can obtain the diversity gain on 4 rank, y ₁, y ₂Can isolate and s through maximum-likelihood decoding ₁And s ₂Corresponding respectively estimated signal

With

The cardinal principle of transmit diversity technique is to utilize the weak correlation of space channel, in conjunction with the selectivity on the frequency, for the transmission of signal provides more copy, improves the reliability of signal transmission, thereby improves the signal to noise ratio of received signal; Portable terminal receives simultaneously by two antennas, can improve diversity gain, but in actual applications, portable terminal need be opened two radio frequency paths simultaneously, and this will increase mobile terminal radio frequency and base band work power consumption, thereby has reduced the operating time of portable terminal.

Above-mentioned SFBC technology is one of MIMO (Multiple-Input Multiple-Out-put, multiple-input and multiple-output) transmission mode, and at present, the MIMO transmission mode is determined by the base station, and indicating mobile terminal.As shown in Figure 2, portable terminal is measured for the parameters of channel quality under the situation of downlink data receiving, and reports the base station; Handle according to the channel measurement parameter of mobile terminal reporting the base station, dynamically judge the quality of channel circumstance, as channel condition information CSI, Reference Signal Received Power RSRP, signal to noise ratio snr and channel quality indicator (CQI) according to mobile terminal reporting, perhaps utilize the symmetry of TDD system channel to obtain the up channel state information, thereby dynamically adjust the MIMO transmission mode, and by the adjusted MIMO transmission mode of down control channel notice portable terminal; Portable terminal is then adjusted the operating state of radio frequency and base band device according to the MIMO transmission mode that receives.

Adopt scheme shown in Figure 2, the base station is according to the measuring amount of terminal to report or the measuring amount of up channel, dynamically adjust base station multi-antenna emission formula, and method by many antennas of descending control signaling indicating mobile terminal receive mode, as when channel quality is better, adopt and indicating mobile terminal employing single-antenna transmission and receive mode, when channel quality is relatively poor, adopt and indicating mobile terminal employing two antenna transmit and receive mode, portable terminal is after receiving the indication of adopting single-antenna transmission and receive mode, can close a radio frequency path, to reach the purpose of saving power consumption.

Yet dynamically adjusting many antenna emission/receive modes in base station side needs the long adjustment time, before portable terminal receives indication, still will open two radio frequency paths, still has bigger power consumption during this.

The utility model content

The utility model embodiment provides a kind of portable terminal, in order to the minimizing power consumption of mobile terminals, thus the operating time of improving portable terminal.

The utility model embodiment provides a kind of portable terminal, comprising: baseband chip, and the radio frequency chip that links to each other with described baseband chip by lead;

Described baseband chip, be used for determining the antenna receiving mode according to current cqi value, and send and the corresponding power control signal of determining of described antenna receiving mode to described radio frequency chip, and the base band receiving mode of the corresponding described antenna receiving mode adjustment of determining self by described lead;

Described radio frequency chip is used for according to the described power control signal that receives, two receiving branchs that self is comprised control of powering.

Preferable, described baseband chip links to each other with energy supply control module in the described radio frequency chip by described lead, and specifically is used for sending described power control signal by described lead to described energy supply control module;

Described energy supply control module links to each other with described two receiving branchs respectively, and is used for according to the described power control signal that receives, to the control of powering of described two receiving branchs.

Preferable, channel quality judge module in the described baseband chip links to each other with described energy supply control module by described lead, be used for determining the antenna receiving mode, and send and the corresponding described power control signal of determining of described antenna receiving mode to described energy supply control module by described lead according to current cqi value.

Preferable, channel quality judge module in the described baseband chip links to each other with described radio frequency chip by described lead, be used for determining the antenna receiving mode, and send and the corresponding described power control signal of determining of described antenna receiving mode to described radio frequency chip by described lead according to current cqi value.

In the portable terminal that the utility model embodiment provides, baseband chip is determined the antenna receiving mode according to current cqi value, and send and the corresponding power control signal of determining of antenna receiving mode to radio frequency chip, and the base band receiving mode of the corresponding antenna receiving mode adjustment of determining self by lead; Accordingly, radio frequency chip is according to the power control signal that receives, two receiving branchs that self is comprised control of powering.Thereby no longer need antenna receiving mode according to the indication adjustment self of base station, but adjust the antenna receiving mode according to current cqi value by self, thereby saved the time of this process of indicating mobile terminal again of determining that the antenna receiving mode is carried out in the base station, and then reduced power consumption of mobile terminals, improved the operating time of portable terminal.

Description of drawings

Fig. 1 is that the signal of available technology adopting SFBC scheme sends and the schematic diagram that receives;

Fig. 2 dynamically adjusts the schematic diagram of MIMO transmission mode for base station side in the prior art;

One of structural representation of the portable terminal that Fig. 3 provides for the utility model embodiment;

Two of the structural representation of the portable terminal that Fig. 4 provides for the utility model embodiment;

Three of the structural representation of the portable terminal that Fig. 5 provides for the utility model embodiment;

Four of the structural representation of the portable terminal that Fig. 6 provides for the utility model embodiment;

The portable terminal that Fig. 7 provides for the utility model embodiment is dynamically adjusted the flow chart of antenna receiving mode.

Embodiment

In order to provide the minimizing power consumption of mobile terminals, thereby improve the implementation of the operating time of portable terminal, the utility model embodiment provides a kind of portable terminal, below in conjunction with Figure of description preferred embodiment of the present utility model is described, be to be understood that, preferred embodiment described herein only is used for description and interpretation the utility model, and is not used in qualification the utility model.And under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.

The utility model embodiment provides a kind of portable terminal, as shown in Figure 3, comprising: baseband chip 31, and pass through the radio frequency chip 33 that lead 32 links to each other with baseband chip 31, wherein:

Baseband chip 31, be used for determining the antenna receiving mode according to current cqi value, and pass through the corresponding power control signal of antenna receiving mode that lead 32 sends and determines to radio frequency chip 33, and the base band receiving mode of the corresponding antenna receiving mode adjustment of determining self;

Radio frequency chip 33 is used for according to the power control signal that receives, two receiving branchs that self is comprised control of powering.

Concrete, can be as shown in Figure 4, radio frequency chip 33 specifically comprises: receiving branch 41, receiving branch 42 and energy supply control module 43, wherein:

Baseband chip 31 links to each other with energy supply control module 43 in the radio frequency chip 33 by lead 32, and by lead 32 to energy supply control module 43 transmission power control signals;

Energy supply control module 43 links to each other with receiving branch 42 with receiving branch 41 respectively, and is used for according to the power control signal that receives, to the control of powering of receiving branch 41 and receiving branch 42.

Concrete, can also be as shown in Figure 5, specifically comprise channel quality judge module 51 in the baseband chip 31, and be to link to each other with radio frequency chip 33 by lead 32 by channel quality judge module 51, be used for determining the antenna receiving mode, and send and the corresponding power control signal of determining of antenna receiving mode to radio frequency chip 33 by lead 31 according to current cqi value.

Concrete, can also adopt structure shown in Figure 4 by radio frequency chip 33, baseband chip 31 adopts structure shown in Figure 5, specifically as shown in Figure 6, be that channel quality judge module 51 in the baseband chip 31 links to each other with energy supply control module 43 in the radio frequency chip 33 by lead 32, and send and definite corresponding power control signal of antenna receiving mode to energy supply control module 43 by lead 32 by channel quality judge module 51.

The portable terminal that the utility model embodiment shown in Figure 6 provides, also comprised RF front-end module 60, and the filter in the RF front-end module 60 601 is used for the signal that antenna 61 receives is carried out Filtering Processing, and the signal after will handling sends to receiving branch 41, filter 602 in the RF front-end module 60 is used for the signal that antenna 62 receives is carried out Filtering Processing, and the signal after will handling sends to receiving branch 42.

Be example with portable terminal shown in Figure 6 below, based on the cqi value that detects, the scheme of dynamically adjusting the antenna receiving mode is described in detail, and as shown in Figure 7, specifically comprises to portable terminal:

The baseband chip 31 of step S701, portable terminal is measured current cqi value in real time according to the downstream signal that receives, and as RSRP or SNR, and the current cqi value that will measure sends to the channel quality judge module 51 in the baseband chip 31.

Step S702, channel quality judge module 51 judge whether current cqi value surpasses preset threshold value, if surpass, represent that current channel quality is better, can adopt the single antenna receiving mode, enter step S703, otherwise, represent that current channel quality is relatively poor, should adopt the double antenna receiving mode, enter step S704.

Step S703, channel quality judge module 51 energy supply control module 43 in radio frequency chip 33 sends the power control signal of signal for the outage index signal, and the base band receiving mode of baseband chip 31 corresponding adjustment self is the single antenna receiving mode.

It is the power control signal of power indicator signal that step S704, channel quality judge module 51 energy supply control module 43 in radio frequency chip 33 sends signal, and the base band receiving mode of baseband chip 31 corresponding adjustment self is the double antenna receiving mode.

Energy supply control module 43 in step S705, the radio frequency chip 33 is after receiving the outage index signal, indication according to this outage index signal, close the power supply of one of receiving branch 41 and receiving branch 42 these two receiving branchs, only keep power supply an other branch road.

To open the power supply of receiving branch 41, the power supply of closing receiving branch 42 is an example, at this moment, is opened by the radio frequency path that antenna 61, filter 601 and receiving branch 41 are formed, and is closed by the radio frequency path that antenna 61, filter 602 and receiving branch 42 are formed.

When only a radio frequency path was opened, corresponding, baseband chip 31 was adjusted into the single antenna receiving mode, and channel matrix is changed to:

The signal that receiving terminal receives is

N in the formula ₁, n ₂It for average 0 additive white Gaussian noise.

The linear merging of work handles to the received signal after in like manner estimating H through channel estimation module:

y ₁＝h ₁ ^*r ₁+h ₂r ₁ ^*＝(|h ₁| ²+|h ₂| ²)s ₁+h ₁ ^*n ₁+h ₂n ₂ ^*

y ₂＝h ₂ ^*r ₁-h ₁r ₂＝(|h ₁| ²+|h ₂| ²)s ₂-h ₁n ₂ ^*+h ₂ ^*n ₁

By following formula as seen, system still can obtain the diversity gain on 2 rank, y ₁, y ₂Can isolate through maximum-likelihood decoding

With

This shows that under the reasonable condition of channel circumstance, portable terminal can be by closing the power supply of a receiving branch, suitably reduce diversity gain and do not influence transmission rate, thereby reach the purpose that reduces radio-frequency power consumption and prolong the operating time of terminal.

Energy supply control module 43 in step S706, the radio frequency chip 33 is after receiving power indicator signal, indication according to this power indicator signal, open the power supply of receiving branch 41 and receiving branch 42 these two receiving branchs, power supply when realizing to two receiving branchs.

At this moment, the radio frequency path of forming by antenna 61, filter 601 and receiving branch 41 and all open by the radio frequency path that antenna 61, filter 602 and receiving branch 42 are formed.

In sum, the scheme that the utility model embodiment provides, comprise: baseband chip, and the radio frequency chip that links to each other with baseband chip by lead, wherein: baseband chip, be used for determining the antenna receiving mode, and send and the corresponding power control signal of determining of antenna receiving mode to radio frequency chip, and the corresponding antenna receiving mode of determining is adjusted the base band receiving mode of self by lead according to current cqi value; Radio frequency chip is used for according to the power control signal that receives, two receiving branchs that self is comprised control of powering.The scheme that adopts the utility model embodiment to provide has reduced power consumption of mobile terminals, has improved the operating time of portable terminal.

Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.

Claims (4)

1. a portable terminal is characterized in that, comprising: baseband chip, and the radio frequency chip that links to each other with described baseband chip by lead;

Described baseband chip, be used for determining the antenna receiving mode according to current cqi value, and send and the corresponding power control signal of determining of described antenna receiving mode to described radio frequency chip, and the base band receiving mode of the corresponding described antenna receiving mode adjustment of determining self by described lead;

Described radio frequency chip is used for according to the described power control signal that receives, two receiving branchs that self is comprised control of powering.

2. portable terminal as claimed in claim 1, it is characterized in that, described baseband chip links to each other with energy supply control module in the described radio frequency chip by described lead, and specifically is used for sending described power control signal by described lead to described energy supply control module;

Described energy supply control module links to each other with described two receiving branchs respectively, and is used for according to the described power control signal that receives, to the control of powering of described two receiving branchs.

3. portable terminal as claimed in claim 2, it is characterized in that, channel quality judge module in the described baseband chip links to each other with described energy supply control module by described lead, be used for determining the antenna receiving mode, and send and the corresponding described power control signal of determining of described antenna receiving mode to described energy supply control module by described lead according to current cqi value.

4. portable terminal as claimed in claim 1, it is characterized in that, channel quality judge module in the described baseband chip links to each other with described radio frequency chip by described lead, be used for determining the antenna receiving mode, and send and the corresponding described power control signal of determining of described antenna receiving mode to described radio frequency chip by described lead according to current cqi value.

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