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What is channel estimation in MIMO OFDM?
The channel estimation is carried out with conventional Least Square (LS) and Minimum Mean Square (MMSE) estimation algorithms. The performance of MIMO-OFDM system is evaluated on the basis of Bit Error Rate (BER) and Mean Square Error (MSE) level.
How is channel estimation done in OFDM?
Channel Estimation Overview The populated resource grid represents several subframes containing data. This grid is then OFDM modulated and passed through the model of the propagation channel. Channel noise in the form of additive white Gaussian noise (AWGN) is added before the signal enters the receiver.
What is channel estimation techniques?
Channel estimation can be carried out in different ways: with or without the help of a parametric model, using frequency and/or time correlation properties in the wireless channel, blind methods or those based on training pilots, adaptive or non-adaptive methods.
What is the need for channel estimation?
Channel estimation plays an important role in a communication receiver. In order to mitigate hostile channel effects on the received signal, precise channel estimation is required to provide information for further processing of the received signal. Channel estimators can be categorized as non-data-aided or data-aided.
What is the purpose of OFDM?
Primarily, OFDM is more resilient to electromagnetic interference, and it enables more efficient use of total available bandwidth because the subchannels are closely spaced. It is also more resistant to interference because several channels are available.
What are the techniques used in channel estimation?
Is OFDMA same as MU-MIMO?
OFDMA and MU-MIMO are complementary technologies. While OFDMA is ideal for low-bandwidth, small-packet applications such as IoT sensors, MU-MIMO increases capacity and efficiency in high-bandwidth applications like mission-critical voice calls and video streaming.
What are the problems in OFDM?
These include power consumption, linearity, image rejection, phase distortion and phase noise. If these issues are not resolved, the resulting 5-GHz WLAN modem will deliver lower than anticipated data rates and compromised range.
What is channel estimation techniques in wireless communication?
Why MIMO OFDM thesis projects?
MIMO OFDM Thesis Projects provide knowledgeable environment to upgrade your knowledge also with the aid of our world level certified experts. We provide highly sophisticated research topics in various research areas. MIMO-OFDM is also a modern wireless broadband system which provides wide coverage and reliable communication.
What is an OFDM system?
Orthogonal Frequency division multiplexing (OFDM) Systems are especially suited for channel estimation. The subcarriers are closely spaced.While the system is generally used in high speed applications that are capable of computing channel estimates with minimum delay.
What is MIMO-OFDM?
MIMO-OFDM is also a modern wireless broadband system that provides wide coverage and reliable communication. We provide highly sophisticated research topics in various research areas. Today, most students take their research in MIMO-OFDM due to its good rate of data transmission and robustness again good spectral efficiency and multipath fading.
What is channel estimation?
The main goal of Channel Estimation is to measure the effects of the channel on known or partially known set of transmissions. Orthogonal Frequency division multiplexing (OFDM) Systems are especially suited for channel estimation.