1. Wireless communication Emmanuel Gyebison

2. Transmission Signals must be converted into digital values, using a circuit called ADC (Analog to Digital Converter), before they can be manipulated by digital equipment. Whenever we need the analog signal back, the opposite conversion is needed, which is done by a circuit called Digital to Analog Converter(DAC).

3. ADC The ADC circuit takes samples from the analog signal from time to time, this is called sample rate. Each sample will be converted into a number, based on its voltage level.

5. DAC During the digital to analog conversion, the numbers will be converted again into voltages. An algorithm is used to fill in spaces between points.

7. Noise and Signal-to-noise ratio(SNR) Noise is unwanted additions to signals. Noise is created by a number of things such as electronics, vibrations, and electromagnetic interference. SNR is the level of desired single to the level of background noise. Under certain SNR, we can do coding and advanced modulation. Under certain environments, SNR can be increased, by increasing the transmitting power.

8. BER Bit error rate(BER) is the number of received bits of bit errors divided by the total number of transferred bits during a studied time. To lower the BER different coding schemes are used such as repeated code. Repeated code is when you send the same code multiple times.

9. Modulating Modulation is the process of varying one or more properties of a periodic waveform, this is done with a carrier signal. A carrier signal is usually at a higher frequency than the signal with the information. After the signal has been modulated the carrier signal contains the original signal.

10. Demodulation Demodulation is the act of extracting the original information from the modulated carrier wave.

11. USRP Board The Universal Software Radio Peripheral (USRP), uses a daughterboard and a motherboard a daughterboard, is used for analog operations such as up/down-conversion, filtering, and other signal conditioning. A motherboard provides the following : clock generation and synchronization, FPGA, ADCs, DACs, host processor interface, and power regulation.

12. Using usrp and FFT With a code that was provided to me, I was able to get a fast Fourier transform(FFT) graph of the Wi-Fi in this building and of my home. The federal communication commission (FCC) can use this process to monitor frequencies, because there is a designated broadcasting frequency, so the FCC can see if someone is broadcasting out of the designated frequency.