Contents
Why zero padding in OFDM?
Abstract—Zero padding (ZP) of multicarrier transmissions has recently been proposed as an appealing alternative to the traditional cyclic prefix (CP) orthogonal frequency-division multiplexing (OFDM) to ensure symbol recovery regardless of the channel zero locations.
What does the DC subcarrier indicate?
3. What does the DC subcarrier indicate? Explanation: All the subcarriers of an OFDM symbol do not carry useful data. In OFDM and OFDMA PHY layers, the DC subcarrier is the subcarrier whose frequency is equal to the RF centre frequency of the transmitting station.
Should I disable short guard interval?
Short GI: disabled – Short Guard Interval decreases the time between data characters being sent wirelessly. In an optimal radio environment that could increase throughput but in less than optimal conditions it will instead lead to errors, retransmissions, instability and decreased performance.
Where does zero padding take place in OFDM?
In the OFDM system, the zero-padding operation is implemented on the transmitter side before applying IFFT transformation. The sampling rate is the Nyquist rate or multiple times of the Nyquist rate, this operation named oversampling the baseband data signal in the frequency-
Which is the sampling rate in OFDM systems?
The sampling rate is the Nyquist rate or multiple times of the Nyquist rate, this operation named oversampling the baseband data signal in the frequency- Zero-Padding Techniques in OFDM Systems 706
How are high rate symbols mapped in OFDM?
In an OFDM system, the input high-rate symbols are mapped by using one of the modulation techniques such as Phase-shift keying (PSK) or Quadrature amplitude modulation (QAM). After that, the input data sequences are converted from the serial to the parallel pattern. Let X= [X 0 X 1 , X 2 ., X N−1
Which is better zero padding or cyclic prefix?
Muquet in studied the influence of inserting zero- padding instead of the cyclic prefix in the time-domain, he found that the zero-padding operation is better than the cyclic prefix in terms of the complexity level at the expense of increasing the nonlinearity distortions.