A Variable Structure A Variable Structure Early-Late Gate Symbol Synchronizer for Rapid Blind Timing Recovery of OFDM Systems
نویسندگان
چکیده
A variable structure early-late gate symbol synchronizer for rapid blind symbol timing recovery of OFDM systems is proposed and analyzed. The new synchronizer has the capability of adjusting the loop bandwidth to achieve fast acquisition and to reduce the timing jitter during the tracking phase. The variable structure synchronizer (VSS) proves to acquire symbol timing in a period less than 10 OFDM symbols.
منابع مشابه
Algorithm Design of Variable Symbol Rate of QAM Cable Receiver Chip
Concerning with the system level design of QAM cable receiver chip for cable HDTV DSP-based modem application, a receiver structure with joint Quadrature Amplitude Demodulator is introduced, blind decision feedback equalizer (DFE) loop, variable symbol timing recovery loop, carrier recovery loop and AGC loop. The architecture of blind DFE, with Constant Modulus Algorithm (CMA) initialization bl...
متن کاملIjraet Recovery of Oqam Signals Using Carrier Frequency Offset and Blind Symbol Timing Estimation in Ofdm Systems
Orthogonal frequency-division multiplexing (OFDM) systems are highly sensitive to synchronization errors. We introduce an algorithm for the blind estimation of symbol timing and carrier frequency offset in wireless OFDM systems. We consider the problem of blind symbol timing (ST) estimation for pulse-shaping orthogonal frequency division multiplexing (OFDM) systems based on offset quadrature am...
متن کاملThe Effect of Narrowband Interference on Timing Synchronization for OFDM Systems
Orthogonal frequency division multiplexing (OFDM) has been of major interest for both wire line and wireless applications due its high data rate transmission capability and its robustness to multipath delay spread. However, OFDM systems can be extremely sensitive and vulnerable to synchronization errors. This paper investigates the effect of narrowband interference on timing synchronization for...
متن کاملChannel Effect Compensation in OFDM System under Short CP Length Using Adaptive Filter in Wavelet Transform Domain
Channel estimation in communication systems is one of the most important issues that can reduce the error rate of sending and receiving information as much as possible. In this regard, estimation of OFDM-based wireless channels using known sub-carriers as pilot is of particular importance in frequency domain. In this paper, channel estimation under short cyclic prefix (CP) in OFDM system is con...
متن کاملA fast synchronizer for burst modems with simultaneous symbol timing and carrier phase estimations
ct In burst-mode data transmission used in GSM and IS2. INITIAL PARAMETER ESTIMATIONS FOR BURST Abstra 136, rapid acquisition of the symbol timing and the carrier phase from the observation of a short signal-segment is essential. Feedforward timing recovery is well suited for such transmissions due to its rapid acquisition characteristics. For personal mobile communications where low complexity...
متن کامل