Fsk Modulation and Demodulation

Mixer is an active or passive device, from a switching signal Frequency to another. It can be adjusted or the demodulated signal. It has three signals Connection, which is called a port in the language of radio engineers. There are three ports. It is the RF input, a local oscillator input, and intermediate Frequency output. (NA, NA)

Handheld radios will be used as the primary communication device. Each radio will be fully charged prior to the event, and set to channel 1.

This process of Fourier transform and back-transform establishes the essential frequency components of the temporal data while eliminating high-frequency noise. This is a powerful technique to:

WiMAX can transmit speeds up to 50km at 280mbps, and provides options for use in point to point and multipoint configurations.

The stream of complex numbers is rearranged so that the pilots can be inserted. In each OFDM symbol, four pilot signals are inserted in order to make the coherent detection robust against frequency offsets and phase noise. The pilots are BPSK modulated by a pseudo binary sequence to prevent the generation of spectral lines [18]. A zero padded block adds zeros, in the right places, to adjust the IFFT bin size to length N. Selector block rearranges the sub-carriers so that real signal output can be generated. The IFFT block then computes the Inverse Fast Fourier Transform (IFFT) of length N, where, for ease of implementation, N is a power of

The objective of this lab is to learn how to use the Tutor TIMS software to build and analyze a communication system. This lab required us to use Audio Oscilloscope, Adder and Tuneable LPF in order to get the required frequency signals.

It provides the hardware means of sending and receiving data on a carrier, including defining cables, cards and physical aspects.

A composite signal can be decomposed into individual sine waves called harmonies.Fourier analsis is done to decompose a signal.the decomposed signals have different amplitude,frequency and phase.A periodic signal has

these subcarriers to a higher frequency band. Except for a multiplying constant (1=N), the above

• Interception: is considered to be a passive attack in which the intruder listens and records the sent encrypted messages to be decrypted later on.

strating the energy transformations involved in the process * outlines what frequency modulation or amplitude modulation is

During this moment the speech processor converts the sound signals heard through the microphone into digital signals. Following on, the digital signals are then sent through to the transmitter. The transmitter, which converts the digital signals into electric impulses, sends this signal through to the receiver/ stimulator using radio waves.

Filters can either emphasize or reduce some frequencies from a signal. There are different types of filters that can be used. There are different types of filters that can be used. There are also filters that can reject frequencies within a certain frequency band e.g. band bass or band reject.

sound, turns that sound into a digital code, and then transmits that code by the coil on the

Precoding requires channel state information at the transmitter. When there is multiple antennas at the receiver, the transmit beamforming cannot simultaneously maximize the signal level at all the receive antennas, and precoding with multiple stream is used.