CN100403832C - Multifrequency multi-mode terminal checking system - Google Patents

Abstract

The present invention relates to a multifrequency multi-mode terminal checking system. The present invention comprises an AD/DA circuit, a single-chip computer, a digital signal processor and a console terminal computer, wherein in a receiving link, after the single-chip computer initializes a received signal processor, signals received from an antenna are converted into IF signals by an RF module so as to enter into the received signal processor after converted into digital signals via A/D conversion, and the base band data outputted from the received signal processor enters into the digital signal processor through an MCBSP interface; in a transmitting chain, after the single-chip computer initializes a transmitted signal processor, the base band data outputted from the digital signal processor enters into the transmitted signal processor, and the outputted digital base band signals enter into the RF module after converted into analog I/Q signals via D/A conversion and are transmitted via the antenna; the digital signal processor is connected with the console terminal computer via an 8-bit datum interface of a USB interface. The present invention has the advantage that the multifrequency multi-mode terminal checking system can test a mobile phone through a familiar port when provided with nothing but a multifrequency multi-mode terminal radio-frequency module without a set of complete system.

Description

Multi-frequency multi-mode terminal verification system

Technical field

The present invention relates to a kind of multi-frequency multi-mode terminal verification system.

Background technology

The multi-frequency multi-mode radio-frequency module is widely used in the various multifrequency and multiple mode cellphones, and the multi-frequency multi-mode radio-frequency module that is applied in the mobile phone mainly contains GSM/WCDMA dual band/dual mode, GSM/WCDMA/cdma2000/CDMAIS-95 three frequency/four moulds, GSM/WCDMA/TD-SCDMA three frequency/three moulds etc.

Development along with digital communication technology, so that the service of high speed data transfer, multimedia obligation to be provided is that the IMT2000 of third generation mobile system of purpose arises at the historic moment, it comprises several different systems such as W-CDMA, cdma2000, TD-SCDMA and LAS-CDMA, press for the mobile phone of being furnished with the multi-frequency multi-mode radio-frequency module in actual applications, realize freely switching between the described multiple different system system, to adapt to the actual needs of global roaming.

General communication system is comprising integral baseband, D/A converter module and radio-frequency module.In that being verified, certain part is based on that complete system carries out.For dividing the work the colony of research and development of refinement day by day, can run into the situation that only has the partial design entity like this, common verification method requires high to the integrality of system, and test is difficult for finishing voluntarily.How the multi-frequency multi-mode radio-frequency module that freely switches between several different systems such as W-CDMA, cdma2000, TD-SCDMA and LAS-CDMA is verified in process of production, be yet there are no report.

Summary of the invention

The objective of the invention is to: at the system complex that traditional verification mode exists, especially can not carry out the practical problem of simplation verification in process of production, a kind of multi-frequency multi-mode terminal verification system is provided.

The object of the present invention is achieved like this: a kind of multi-frequency multi-mode terminal verification system, it is characterized in that: comprise the AD-DA circuit in the verification system, single-chip microcomputer, digital signal processor DSP and console terminal computer, wherein: received signal enters receiving front-end through duplexer and duplexer, receive link: after the single-chip microcomputer processor RSP initialization to received signal, the IF signal that the signal that the antenna simulation receives is become by the RF module converts, enter received signal processor RSP after A/D converts high-speed digital signal to, the output base band data of received signal processor RSP enters digital signal processor DSP by multichannel buffer memory serial port; Transmitting chain: after single-chip microcomputer is to transmit signal processor TSP initialization, the base band data of digital signal processor DSP output enters transmit signal processor TSP, the digital baseband of transmit signal processor TSP output enters the RF module after D/A converts Simulation with I/Q signal to, launched through antenna by power amplifier, duplexer, duplexer by variable gain amplifier; Under the control of single-chip microcomputer, digital signal processor DSP is connected with the console terminal computer by 8 bit data interface of USB interface.

The invention has the advantages that: under the situation of the multi-frequency multi-mode terminal radio frequency module of having only mobile phone,, just can test, not need to provide a cover holonomic system it by the port of being familiar with.

Description of drawings

Fig. 1 is a system block diagram of the present invention;

Fig. 2 is the functional block diagram of a kind of AD-DA circuit that the present invention relates to;

Fig. 3 is the filtering analogous diagram of W-CDMA pattern;

Fig. 4 is the filtering analogous diagram of cdma2000 pattern;

Fig. 5 is the filtering analogous diagram of TD-SCDMA pattern.

Embodiment

The invention will be further described below in conjunction with accompanying drawing.

As seen from Figure 1: comprise AD-DA circuit, single-chip microcomputer, digital signal processor DSP and console terminal computer in the verification system, wherein: receive link: after the single-chip microcomputer processor RSP initialization to received signal, the radiofrequency signal that the antenna simulation receives becomes the IF signal by the RF module converts, this intermediate-freuqncy signal enters received signal processor RSP after A/D converts high-speed digital signal to, the output base band data of received signal processor RSP enters digital signal processor DSP; Transmitting chain: after single-chip microcomputer is to transmit signal processor TSP initialization, the baseband signal of digital signal processor DSP output enters transmit signal processor TSP, the digital baseband signal of transmit signal processor TSP output enters the RF module after converting Simulation with I/Q signal to behind the D/A, launch through antenna again; Under the control of single-chip microcomputer, the USB8 bit data interface of digital signal processor DSP is connected with the console terminal computer.

Fig. 2 is under the prerequisite of the inside basic structure that has disclosed transmit signal processor TSP, received signal processor RSP, D/A conversion and A/D conversion, further set forth the transmittance process that is verified data that relates to of the present invention, disclosed as seen by Fig. 2: concrete AD-DA process is, the IF signal that is provided by radio-frequency module is at first carried out bandpass sampling by high-speed AD, then sends DDC (digital down-conversion block) to and carries out delivering to DSP behind Digital Down Convert, the digital filtering; DSP gives data and is converted to parallel data and is given to DUC (digital up conversion module) and carries out sending the DA module to after digital filtering, the Digital Up Convert (can omit), and DA re-sends to radio-frequency module after numerical data is become Simulation with I, Q signal.Digital filter in the wherein digital down conversion plays a part more important for the signal to noise ratio of signal and the inhibition of obstruction or monkey chatter.

When checking W-CDMA pattern, filter parameter is as follows: total extraction yield=16; The CIC2 extraction yield $\frac{M_{\mathrm{CIC}2}}{L_{\mathrm{CIC}2}}=8/3;$ CIC5 extraction yield M _CIC5=2; RCF extraction yield M _RCF=3.As seen from Figure 3: three dB bandwidth 3.84MHz, 2.5MHz place suppress to surpass 23db.

When checking CDMA2000 pattern, filter parameter is as follows: total extraction yield=50; The CIC2 extraction yield $\frac{M_{\mathrm{CIC}2}}{L_{\mathrm{CIC}2}}=5/3;$ CIC5 extraction yield M _CIC5=2; RCF extraction yield M _RCF=15.As seen from Figure 4: three dB bandwidth 1.2288MHz, 915KHz place suppress to surpass 18db.

When checking TD-SCDMA pattern, filter parameter is as follows: total extraction yield=48; The CIC2 extraction yield $\frac{M_{\mathrm{CIC}2}}{L_{\mathrm{CIC}2}}=6/5;$ CIC5 extraction yield M _CIC5=2; RCF extraction yield M _RCF=20.As seen from Figure 5: three dB bandwidth 1.28MHz, 1MHz place suppress to surpass 20db.

Claims (3)

1. multi-frequency multi-mode terminal verification system is characterized in that: comprise AD-DA circuit, single-chip microcomputer, digital signal processor DSP and console terminal computer in the verification system, wherein:

A) receive link: received signal enters receiving front-end through duplexer and duplexer, after the single-chip microcomputer processor RSP initialization to received signal, the signal that the antenna simulation receives is the IF signal by the RF module converts, enter received signal processor RSP again after A/D converts high-speed digital signal to, the output base band data of received signal processor RSP enters digital signal processor DSP by multichannel buffer memory serial port;

B) transmitting chain: after single-chip microcomputer is to transmit signal processor TSP initialization, the base band data of digital signal processor DSP output enters transmit signal processor TSP, enter the RF module after the digital baseband signal of transmit signal processor TSP output converts Simulation with I/Q signal to by D/A, launch through antenna by power amplifier, duplexer, duplexer by variable gain amplifier;

C) under the control of single-chip microcomputer, digital signal processor DSP is connected with the console terminal computer by 8 bit data interface of USB interface.

2. multi-frequency multi-mode terminal verification system according to claim 1 is characterized in that: the interface mode between single-chip microcomputer and received signal processor RSP, the transmit signal processor TSP is Intel bus mode or Motorola bus mode.

3. multi-frequency multi-mode terminal verification system according to claim 2 is characterized in that: single-chip microcomputer adopts 8 single-chip microcomputers, and the interface mode between single-chip microcomputer and received signal processor RSP, the transmit signal processor TSP is the Intel bus mode.

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