Dynamic Spectrum Access Simulation

In direct sequence spread spectrum, the torrent of information to be transmitted is divided into small pieces and each allotted across to a frequency channel across the spectrum (Rouse, 2015). An informational signal at the point of transmission is added with a higher data-rate bit sequence, which is referred to a chipping code that splits the information by way of a spreading ratio (Rouse, 2015). This redundant chipping code provides the signal the ability to resist interference and also allows the original information to be recovered if informational bits are damaged during transmission (Rouse,

Wireless network infrastructure has become just another connection method for corporate and home users alike. This rapid acceptance can be attributed from:

In this section, the currently used decimation filters are considered for comparison and hardware requirements. As the only truly customizable feature within the current design, it is imperative to find a filter that can satisfy the requirements that will be outlined in later section of the report. As such this review is conducted to find and identify different decimation filters structures that can be used. SDR systems conduct a significant amount of signal processing on general process. To combat this, the SDRs implement sample rate conversion in the form of decimation; the focus of this review is on this premise and what filters have previously been implemented.

What would happen if wireless devices were not governed by the Wi-Fi Alliance and each vendor had its own standards and protocol? What impact would this have on your personal life or business communications?

Ans. The 3G UMTS systems have two logical entities – the Node-B (the radio base station) and the Radio Network Controller (RNC) while the 4G LTE systems have only one logical node – the evolved Node-B (eNode-B).

Now the channel response at all data subcarrier are estimated using pilot subcarriers and are denoted as H ̂_k k= (-N)/2,-,0,-,N/2-1 and the received data can then be equalized

Using the COM-5102, the SDR will transmit the radio signal, this pulg in will add associated MAC addresses and UDP headers onto the project automatically [15]. The VHDL code has values that can be changed slightly to accommodate UDP or TCP transmission. For the project, UDP headers will be used.

ANS: The entire process is performed by multiplying a radio frequency carrier and a pseudo-noise (PN) digital signal. The PN code is modulated onto an information signal using several modulation techniques such as quadrature phase-shift keying (QPSK), binary phase-shift keying (BPSK), etc. A doubly-balanced mixer then multiplies the PN modulated

The Radio was introduced to society because of the telegraph and the telephone. These inventions don’t do the same things but their similar branch of technology. “Radio technology began as “wireless telegraphy”. “It all started with the discovery of radio waves, electromagnetic waves that have the capacity to transmit music, speech, pictures and other data invisibly through air.” [Bellis] Majority of technology uses electromagnetic waves to send data information or TV broadcasts. During the 1860’s, Scottish physicist, James Clerk Maxwell predicted the existence of radio waves; and in 1886, German physicist, Heinrich Rudolph Hertz showed how fast the variation of electric current could be placed into space in the form of

Nevertheless, with the development of technology, the flourishing situation in the radio industry has been changed.

Networking is not new; it has been around for a long time. The way networking is done changes all the time; let’s look briefly at the past and how networking has changed over the years.

The research paper will also include the analysis of mobility between systems working on 3GPP and non 3GPP standards. Mobile operators are working on Network Densification by deploying

In 2002 and 2003, WLAN products supporting a newer standard called 802.11g emerged on the market. 802.11g attempts to combine the best of both 802.11a and 802.11b. 802.11g supports bandwidth up to 54 Mbps, and it uses the 2.4 GHz frequency for greater range. 802.11g is backwards compatible with 802.11b, meaning that 802.11g access points will work with 802.11b wireless network adapters and vice

Software defined networking is a concept born out of the need to control network devices centrally, wherein the service offered by a device is decoupled from the device in a way that

Frequency-hopping spread-spectrum (FHSS) is a method that uses a narrow band carrier that changes frequencies in a distinct pattern. The signal hops to a variety of frequencies, with the exact sequence of changes, known as the hopping sequence. At any moment, the broadcast signal uses only one frequency, or even several frequencies is not enough to effectively affect the communication between devices. The FHSS is used between 2.4 GHz and 2.5 GHz and operates at a data rate of about 1.6 Mbs per channel. Direct sequence spread-spectrum (DSSS) generates a bit pattern for each bit to be transmitted. This bit pattern is called a chip or chipping code (Kurose, 2003).