OFDM不用带通滤波器来分隔子载波,而是通过快速傅立叶变换(FFT)来选用那些即便混叠也能够保持正交的波形。 OFDM技术属于多载波调制(Multi-Carrier Modulation,MCM)技术。有些文献上将OFDM和MCM混用,实际上不够严密。MCM与OFDM常用于无线信道,它们的区别在于:OFDM技术特指将信道划分成正交的子信道,频道利用率高;而MCM,...
OFDM不用带通滤波器来分隔子载波,而是通过快速傅立叶变换(FFT)来选用那些即便混叠也能够保持正交的波形。 OFDM技术属于多载波调制(Multi-Car rierModulation,MCM)技术。有些文献上将OFDM和MCM混用,实际上不够严密。MCM与OFDM常用于无线信道,它们的区别在于:OFDM技术特指将信道划分成正交的子信道,频道利用率高;而MCM,...
SOLUTION: The band limit filters at the RF stage and IF stage of a COFDM modulation signal receiver employ variable band tuning double-tuned tracking filters 3, 7, 8, 12 and controllable impedance matching units 4, 6, 9, 11 are provided at the RF stage. Consequently, basic performances of...
OFDM(Orthogonal Frequency Division Multiplexing)即正交频分复用技术,实际上OFDM是MCM(Multi Carrier Modulation),多载波调制的一种。 OFDM技术的主要思想就是在频域内将给定信道分成许多正交子信道,在每个子信道上使用一个子载波进行调制,并且各子载波并行传输。这样,尽管总的信道是非平坦的,具有频率选择性,但是每个子...
-- COFDM modulation and H.264/H.265 video compression. -- Full HD resolution, maximum 1080p/i @60fps. -- Great security by AES256 encryption. -- Stable signal transfer in NLOS and high-speed motion. -- Adjustable working frequency, band width, bit stream rates, RF power,etc. ...
OFDM技术属于多载波调制(MultiCarrier Modulation,MCM)技术。有些文献上将OFDM和MCM混用,实际上不够严密。MCM与OFDM常用于无线信道,它们的区别在于:OFDM技术特指将信道划分成正交的子信道,频道利用率高;而MCM,可以是更多种信道划分方法。OFDM技术的推出其实是为了提高载波的频谱利用率,或者是为了改进对多载波的调制,它...
COFDM技术属于多载波调制(Multi-Carrier Modulation,MCM)技术。有些文献上将OFDM和MCM混用,实际上不够严密。MCM与COFDM常用于无线信道,它们的区别在于:COFDM技术特指将信道划分成正交的子信道,频道利用率高;而MCM可以是更多种信道划分方法。 C O FD M技术的推出其实是为了提高载波的频谱利用率,或者是为了改进对多载波...
Modulation: COFDM Frequency: 300-4400MHz (100MHz Space For User) Portable Suitcase: PALICAN From US, Perfect Quality RF Bandwidth: 2/2.5/4/8MHz manpack wireless COFDM video transmitter Modulation: COFDM Frequency: 300-4400MHz (100MHz Space For User) RF Power: 15-20W Optional ...
Modulation COFDM Video encoding MPEG-2/MPEG-4 Encryption AES/ALLTECH Basic scrambling Constellation QPSK/16QAM @ 1.25/2.5MHzQPSK/16QAM/64QAM @ 6/7/8MHz FEC 1/3, 2/3 @ 1.25/2.5MHz1/2, 2/3, 3/4, 5/6, 7/8 @ 6/7/8MHz Carrier 2K GUI 1/8, 1/16 @ 1.25/2.5MHz...