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  • Analysis Of UWB Communication Systems

    Multi input Multi output (MIMO) System of two U-shape patch antennas has been evolved for the UWB application. Spacing between two elements of antennas is 0.270 at 3.1GHz for the UWB operation. To enhance isolation and increase bandwidth impedance, fork shaped stub added in the ground plane of the antenna. Due to interference of WIMAX (3.3-3.7 GHZ) and WLAN (5.2-5.8 GHz) on UWB dual band notch function is perform. For achieving the dual band notch characteristics, trekking slot cut in the patch with feed and C- shaped strip are placed adjacently to the feed line of the antenna. Due to fork shaped stub in ground plane, reducing of mutual coupling between elements | | ≤ -20dB. Peak gain, Efficiency Of antenna…

    Words: 1660 - Pages: 7
  • Case Study: The Diversity Of User Cooperation

    single-elimination. It is using different channels, such as time, frequency and space diversity, and diversifies income. (W. Yu and T. Lan, 2007) In particular, data from more multiple output (MIMO) systems theory, provided that the requirements of multiple wireless transceivers antenna spatial diversity. However, in many applications such as wireless sensor networks and mobile phones, wireless devices, the size and cost constraints, a single terminal, multiple antennas, it is unrealistic.…

    Words: 3958 - Pages: 16
  • Essay On Advantages And Disadvantages Of OFDM

    2 OFDM SYSTEM:- OFDM system is divided into three parts 1. multi carrier modulation 2. frequency division multiplexing 3. Orthogonal frequency division multiplexing. 1.Frequency division multiplexing:- Frequency Division Multiplexing is a form of signal multiplexing which involves assigning non – overlapping frequency ranges or channels to different signals or to each user of a medium. A gap is left between each of these channels to ensure that the signal of one channel does not overlap with…

    Words: 1529 - Pages: 7
  • Analysis Of Qos Analysis Of 4G And 3G

    QoS Analysis of 3G and 4G systems Abstract— The cellular communication system performance is improved by increasing channel capacity and spectrum efficiency. Spectral efficiency (SE) is a key factor in the design of cellular communication system as it quantifies how well the limited frequency spectrum resource is utilized. The efficient use of spectrum is analyzed in terms of coverage area, capacity and reuse distance. OFDMA is a very potential multiple access technique, which will be the…

    Words: 934 - Pages: 4
  • IEEE 802.11: The Standard Of Wireless Communication Technology

    user much better experience for data voice and video, the main reason of that speed is it allow multiple antennas to provide better range at given throughput and improve the service. In the physical layer 802.11n uses multiple antennas for transmitter and receiver known as Multiple Input/Multiple Output (MIMO) technology. (Intel). Before 802.11n both the transmitter and receiver were Single Input/Single Output (SISO) devices which could make the signal quite weak due to the data traveling in…

    Words: 879 - Pages: 4
  • Nt1310 Unit 3 Data Computing

    transmission of wireless signals there can be a number small cell deployment to reduce the issue of network connectivity [7]. In this technique, a microcell division is created from the macrocell. The main base station that forms the base of the macrocell is split into smaller cells. Therefore, the user equipment (UE) gets connected to a microcell instead of getting connected to the main base station. This way, the UE stays in the network by connecting to a smaller cell that is located closer to…

    Words: 1436 - Pages: 6
  • 5g Case Study

    major drawback is that of a high peak to average power ratio. Modulation schemes like APSK could provide advantages in some cir-cumstances. 4 C. Duplex methods Currently systems use either frequency division duplex, FDD or time division duplex, TDD. New possibilities are opening up for 5G including flexible duplex, where the time or frequencies allocated are variable according to the load. This scheme would enable simultaneous transmission and reception on the same channel. D. Massive MIMO …

    Words: 1221 - Pages: 5
  • Analysis Of The Roku Ultra

    comes with the Roku Advanced remote with batteries, headphones for private listening, a USB cable, and power adapter. In addition to the exclusive functionality already mentioned, the Roku Ultra also does the following: 802.11ac MIMO dual-band wireless 10/100 Base-T Ethernet 720p, 1080p, and 4K UHD with HDR video at 60 frames per second Night listening mode microSD card slot for additional channel storage Advanced point-anywhere remote with voice search, headphone jack, and gaming buttons IR…

    Words: 1273 - Pages: 6
  • Wireless Communication: The Evolution Of Human Society

    times. Very suitable for fast fading channels, this technique uses a lot of resources in the system. 2. Frequency diversity: The copies of the signals are transmitted through different frequencies at the same time. This method is suitable for frequency selective channels. 3. Polarization Diversity: Polarization diversity implies sending the copies with different polarization so that the copies will not interfere during transmission. 4. Spatial diversity: Proving effective than the methods…

    Words: 1049 - Pages: 5
  • Three Basic Modes Of Signal Communication And Mobile Health Applications

    technologies used are wideband code division multiple access (WCDMA), high-speed packet access (HSPA), global system for mobile communication (GSM), general packet radio service (GPRS), international mobile communications (IMT-2000), and wireless fidelity (WiFi) (Kumar et al., 2014). There are two main 4G networks in the U.S. and they are LTE and WiMax. The main benefit of a 4G network is its significantly higher data transmission speeds. 4G networks speeds can range from 100MBPs to 1GBPs…

    Words: 1167 - Pages: 5
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