Mpeg2 contain ratio of two big characteristicses , a high compression for is sport compensating bringing , another to is according to the different need , and pass the to count of regulate to attain the code rate variable . below is an application of a few typical models Mpeg2有兩個(gè)大的特點(diǎn),一個(gè)是運(yùn)動(dòng)補(bǔ)償帶來(lái)的高壓縮比,另一個(gè)就是根據(jù)不同的需求,通過(guò)參數(shù)的調(diào)節(jié)做到碼率可變。以下是幾種典型應(yīng)用。
Through utilizing the shift multiplication characteristics of m series , this kind of radar system eliminates the bad effect of doppler frequency . in theory , the doppler tolerance of the radar system can reach the half of the code rate with proposed echo pretreatment method in this paper 從理論上說(shuō),應(yīng)用于該雷達(dá)系統(tǒng)的信號(hào)處理方法可以使得雷達(dá)系統(tǒng)的多普勒容限達(dá)到偽碼子碼重復(fù)頻率的一半,從而使偽碼調(diào)相雷達(dá)可以有效地發(fā)現(xiàn)高速目標(biāo)。
The performance targets of acquisition and tracking : the code rate of pseudorandom signals is 1m - 5mhz , the code length is 255 . 511 , the receiving sensitivity is - 118dbm , the dynamic range is 70db . the doppler of carrier is 75khz , the time that 10 targets are captured within 0 . 2s 捕獲和跟蹤的性能指標(biāo):偽隨機(jī)信號(hào)碼率1m 5m比特/秒,碼長(zhǎng)是255 、 511 ,接收靈敏度是- 118db ,信號(hào)動(dòng)態(tài)范圍是70db載波普勒是75khz ,目標(biāo)捕獲在0 . 2秒內(nèi)。
The goal of wireless link adaptation technology is to achieve the best performance of communication by changing the parameters of transmitter and receiver according to the variation of the mobile channel dynamically , such as transmit power , modulation scheme and coding rate 所謂的鏈路自適應(yīng)技術(shù)是指在無(wú)線通信系統(tǒng)中根據(jù)無(wú)線信道環(huán)境的變化而動(dòng)態(tài)地調(diào)整發(fā)射機(jī)與接收機(jī)之間的發(fā)射功率、調(diào)制方式、編碼速率等參數(shù),以便使得無(wú)線信道資源能夠得到最大限度的利用。
The embedded instrument can communicate with host the by the interface of bluetooth which can solve the difficulty of using the cable in this area and avoid the high error code rate . in the paper , we select the tms320vc54x dsp and the ericsson bluetooth module , on the basis of rfcomm , developing a embedded instrument 2 、針對(duì)發(fā)電廠內(nèi)環(huán)境惡劣生產(chǎn)區(qū)域的特殊要求,設(shè)計(jì)了帶有藍(lán)牙通信功能的嵌入式工業(yè)儀器儀表,使得現(xiàn)場(chǎng)儀表能夠通過(guò)藍(lán)牙接口與工控機(jī)進(jìn)行通信,從而解決此區(qū)域中鋪設(shè)線纜困難以及其它通信方式信息傳輸誤碼率高等不足。