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Multi-channel PCM audio satellite broadcasting transmission analysis and computer simulation


The first column of the column to the second line in this order ... a go. Figure 7 shows the mode of transmission of bits A mixed matrix of the transmission sequence in the code, the first column 32bn write a 64-64 B ● capsule order mode bit-interleaved matrix of Figure 7A,} J, the first bit is the frame synchronization l6 words, after the l6-bit is the control code. The second column is the range of four-channel bits. Mouth. Hunger ml ∞ l4sTeck. ~, & Deeelopmes ~ Ⅳ 4 receiver against mixed signal process will receive according to the original order. Anti-woven process and is similar intertwined. The program dumped a two-dimensional array, said matrix before interleaving, interleaving resulting from a one-dimensional array of 128 elements, a total of 128 × 16 = 2048 bits (this process is abbreviated) seven, after scrambling code intertwined, sometimes continuous. 0 or \In order to better carry out the receiver bit clock extraction, attached l0 Huan M series PN signal (pseudonoise pseudo-random noise), the M-10 generator polynomial x + x + I, which generated PN signal 0 and there was no rule l. This additional signal known as the scrambling code,[link widoczny dla zalogowanych], the signal with different scrambling codes or after the delivery. At the receiving end will receive the signal with the same or different scrambling signal to recover the original signal. The principle of pseudo-random code generator shown in Figure 8. VIII, the test results to test the algorithm, artificially adding errors, a random noise added to I1 error. Tests show that, with the BCH (63,56) for error control can achieve good results. IX Conclusion In summary, this paper describes more than 199 PCM sound of a read out of a 49 Dai Figure 8 random code sequence generator x + x '+1 way broadcast of high-quality sound with effects. It PCM audio signals with the satellite broadcast signal multiplexing common way l c 【capacity and strong error correction to improve the sound quality, enrich the broadcast content. And, through the use of experimental equipment in the broadcasting satellite (BS-2 in Japan) have obtained results also show that this advantage. As long as the use of domestic small antenna can receive a good quality. As many a new era of satellite broadcasting in a broadcasting service,[link widoczny dla zalogowanych], this high-quality PCM audio transmission will be recognized by a wide audience. The development of CS-2 CS (ComputerizedSlationManagemeniSys-lem) is a satellite communications earth station Zhaizhong monitoring device. Japan has recently developed mainly for CS-2 medium-sized foreign satellite earth stations to use. Based on the character of the system in the past than it is in the expansion, Specific, and many other aspects of user interface improvements. The system consists of the communication earth station equipment t the data collection, the instruction to send the 1 / o interface, the operation of buildings show the use of personal computer components. It has the following characteristics t (1) indicates that the device used to send words of mouth, and to provide multi-window, graphical user interface to improve its operation. (2) Operation display section using a common personal computer, in case of failure easier to maintain. (3) using OS / 2 can be run in a multitasking DOS, and store the data in the analysis can be used DOS database software. (4) z / o interface to connect up to 3 personal computers, both computers are on all lines from the B Ang monitoring. (5) changes to increase the earth station equipment,[link widoczny dla zalogowanych], by providing the users themselves can set and change the business side of CS editing features, and improved pit expansion and specialization. (HO) a sound broadcast receivers 50 a CSPCM, H l2 months of the 1992 officially provide CSPCM18 stereo broadcasting business. To meet the needs of users Ding draft,[link widoczny dla zalogowanych], NEC Corporation pioneered CSPCM audio broadcasting receiver products (NE-PCM9000). Its main features are: (1) using Viterbi decoding. For D lightweight small diameter parabolic antenna can be well-received features mattress, with even at low CN ratio can be a good time for error correction Viterbi decoding circuit. (2) interference with the way Britain COATEC decoder. (3) with high quality D, circuits. -B mode stereo PCM sound broadcasting in Britain take play the rate of 48kHz, higher than the CD. To realize the performance,[link widoczny dla zalogowanych], the use of 8 times oversampling digital to shake the glass, high-precision 18-bit D, and advanced audio converter Britain electrolytic capacitors, resistors. (4) corresponds with a number of parabolic antenna. In order to correspond with as many LNB, with two antenna inputs. Another type of polarization converter control pulse polarization control output octopus child and coaxial with the LNB switch control to switch output terminal. (Ho) and development of communication technology requirements 4 1994
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