Contents
What is a one tap equalizer?
one tap equalizer is just a delay line and gain and is used for equalization of freq. flat channels.
What is equalizer in OFDM?
Frequency domain equalization for OFDM systems with insufficient guard interval using null subcarriers. Abstract: Frequency domain equalizers (FEQs) have been applied extensively in multicarrier systems to enhance transmission rate by reducing transmit redundancy in the form of guard interval.
What is the significance of equalization in mobile communication?
The equalizer is a device that attempts to reverse the distortion incurred by a signal transmitted through a channel. In digital communication its purpose is to reduce inter symbol interference to allow recovery of the transmit symbols. It can be a simple linear filter or a complex algorithm.
What is the most important role of the equalizer in mixing?
The circuit or equipment used to achieve this is called an equalizer. Equalizers are also used in music production to adjust the timbre of individual instruments and voices by adjusting their frequency content and to fit individual instruments within the overall frequency spectrum of the mix.
Where does the equalization take place in OFDM?
Equalization in OFDM usually happens in the frequency domain. Let be the vector of subcarriers in the frequency domain and the corresponding time domain signal. Then, if the impulse response of your channel is a vector , the received signal will be where referes to convolution.
How is the OFDM signal affected by frequency selective filtering?
The OFDM signal as a whole is affected by frequency selective filtering. It is usually designed such that the subcarrier bandwidth is smaller than the channel coherence bandwidth. This yields you frequency flat fading for each subcarrier which can be described by a single complex multiplication and equalization can equally done with just one tap.
How is the subcarrier bandwidth used in OFDM?
It is usually designed such that the subcarrier bandwidth is smaller than the channel coherence bandwidth. This yields you frequency flat fading for each subcarrier which can be described by a single complex multiplication and equalization can equally done with just one tap. Equalization in OFDM usually happens in the frequency domain.
Which is the best choice for zero forcing equalization?
This describes zero-forcing equalization which might not be the best choice if additive noise and interferers are present but it transports the idea. And this is nothing else but one-tap equalization for each individual subcarrier. Thanks for contributing an answer to Signal Processing Stack Exchange!