Apparatus and method for detecting multimedia signal receiving performance of mobile terminal
A mobile terminal and multimedia technology, applied in the directions of synchronization devices, digital transmission systems, electrical components, etc., can solve the problems of unable to demodulate signals, unable to search for mobile multimedia broadcasting networks, expensive detection costs of instruments, etc., and achieve flexible and cost-effective solutions. Effect
Inactive Publication Date: 2011-08-10
ZTE CORP
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In actual communication, there are various interferences and noises. For example, my country's mobile multimedia broadcasting operating frequency band: 2.635~2.66GHz; 470~798MHz. There are GSM900MHz, CDMA800MHz, 2.4GHz IMS (IP Multimedia Subsystem, IP Multimedia subsystem) frequency band and other interference and various noises, so even if the signal is not very weak, the mobile multimedia broadcasting network cannot be searched, mainly because the signal-to-noise ratio is too low and the signal cannot be demodulated.
[0007] In order to be able to detect the reception situation of the mobile multimedia broadcasting service in the current mobile terminal, many instruments are mainly used for testing in the prior art, such as in the national industry standard "Technical Requirements and Test Methods for Terminal Reception Performance of Mobile Multimedia Broadcasting Service" It can be seen that many expensive instruments (such as Figure 4 shown), and this method causes low detection efficiency, and the detection cost is very high due to the expensive instrument
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[0045] According to the provisions of the People’s Republic of China Radio, Film and Television Industry Standard GY / T220.1-2006, the synchronization signal code is a binary pseudo-random sequence code, which is generated by a linear feedback shift register. The synchronization signal generator polynomial is: X 11 +X 9 +1, the first 11 bits of the synchronization signal code are 01110101101. Since multimedia signals are multiplexed in frames, the prerequisite for demultiplexing is signal synchronization, so the frame synchronization status can truly reflect the terminal's mobile multimedia broadcast reception situation.
[0046] Specific embodiments are described in detail below, but they are not intended to limit the present invention.
[0047] Such as Figure 5 Shown is the method for detecting the performance of receiving multimedia signals by a mobile terminal according to an embodiment of the present invention, which specifically includes the following steps:
[0048] Step 101:...
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The present invention discloses a device for detecting the performance of mobile terminal for receiving the multimedia signal and a method thereof. The method comprises the following steps: analyzing synchronous signal code out from the multimedia signal code which is received and demodulated from the mobile terminal, comparing the synchronous signal code to the standard synchronous signal code for calculating the frame error code rate, and obtaining the performance of mobile terminal for receiving the multimedia signal according to the frame error code rate. The invention realizes the detection objects of high efficiency, flexibility and low cost.
Description
Technical field [0001] The present invention relates to the field of wireless mobile communication, and more specifically, to a device and method for detecting the performance of a mobile terminal to receive multimedia signals. Background technique [0002] Mobile multimedia broadcasting has increasingly become a hot spot in the market, and its technology has developed rapidly and standards have been updated rapidly. For example, the European digital video broadcasting handheld reception and transmission standard DVB-H, the United States Multimedia Single Forward Link Standard (MediaFLO) and China Mobile Multimedia Broadcasting Standard (CMMB, China Mobile Multimedia Broadcasting) and so on. The China Mobile Multimedia Broadcasting Standard (CMMB) is a transmission method through satellite and terrestrial wireless broadcasting. A system that realizes seamless coverage of broadcast and television services anytime and anywhere on mobile portable terminals. [0003] The China Mobile...
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IPC IPC(8): H04L1/00H04L7/033
Inventor刘卫刚姚升杨明曹慧海
OwnerZTE CORP