The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this paper, FGPA implementations of amplitude and phase comparison direction finding methods are presented. In amplitude comparison direction finding (AC-DF), the power ratio between the receiver channels is compared with the values in the look-up-table that is generated using antenna patterns. In phase comprison direction finding (FC-DF), basically the phase difference is extracted between channels...
Filterbank multicarrier modulation (FBMC) has been identified as a strong contender for dynamic spectrum access in the TV White Space, as FBMC transceivers are able to control out-of-band interference level without compromising flexible usage. This paper compares FBMC receiver architectures, providing performance and complexity analysis, based on closed form expressions and on an actual implementation...
A compact Time Domain Reflectometry (TDR) system was designed and implemented on a Field-Programmable Gate Array (FPGA). The implementation features potential reconfigurability and reprogrammability of important parameters such as pulse shape, pulse width, pulse repetition frequency, and sampling rate. Furthermore, the digital implementation minimizes the need for external analog components. Experimental...
Next generation wireless communication systems, such as 3GPP LTE-Advanced and ITU IMT-Advanced, are demanded to support 1Giga-bit per second (Gbps) peak data rate. Compared with traditional systems, 1Gbps high throughput systems have some different difficulties in system design and hardware implementation. This paper mainly presents some important design criterions and novel methods on parameter design...
In this paper, we present a prototype FPGA design for an efficient physical layer implementation of a MIMO-OFDM technique. We implement multi-channel MIMO-OFDM systems using single Fast Fourier Transform block that is shared across modulations for the system. Our experimental results show that the proposed implementation saves at least 60 percent of the hardware resources, while achieving the same...
Our paper presents the prototyping of a BCH (Bose, Chaudhuri, and Hocquenghem) encoder and decoder using a Field Programmable Gate Array (FPGA) reconfigurable chip. The solutions implemented on FPGA lead to a high calculation rate using parallelization. We implemented the BCH code in a 3s400FG456 FPGA. In this implementation we used 15 bits-size word code and the results show that the circuits work...
This paper describes the concept, architecture, development and demonstration of a real time, maximum likelihood Alamouti decoder for a wireless 4-transmit 4-receiver multiple input and multiple output (MIMO) Smart Antenna Software Radio Test System (SASRATS) platform. It is implemented on a Xilinx Virtex 2 Pro Field Programmable Gate Array (FPGA).Hardware, firmware, use of the Xilinx Core Generator...
Based on the newly proposed cyclic shift orthogonal keying (CSOK) scheme, this paper presents the top-down design and realization of a dual-mode single-carrier/multi-carrier (SC/MC) spread spectrum (SS) system, including a new DQPSK-HCSOK hybrid modulation scheme and associated differential receiver. Packet and preamble formats are also designed for packet detection, CFO compensation, and channel...
Automatic gain control (AGC) is unavoidable part of radio receivers. Modern receivers combine analog and digital signal processing. Therefore, the AGC circuits are often implemented partially or completely in the digital domain. This paper presents the design of an all-digital high-dynamic AGC, which is suitable for high-frequency software radio receivers that use baseband signal processing. A circuit...
We present the design and implementation of a FPGA prototype for a 300Mbps 2 x 3 MIMO-OFDM transceiver that forms a complete IEEE 802.11n wireless LAN. We also demonstrate that the developed system provides robust and high-data-rate performance.
Spread spectrum technology can effectively solve the problems such as bad channel environment, multi-path fading etc between mobile station and subscribers. At present the research on the synchronization of PN code is more concentrated on how to implement fast acquisition. This paper introduces the sliding correlation method of PN code acquisition, gives out a serial and parallel acquisition method...
Wireless sensor network (WSN) applications demand ultra low power devices. Digital Ultra Wideband (UWB) transceiver can be used as the communication module in a WSN due it its potential for location tracking, ranging and low data rate communication. Current digital UWB receiver architecture incorporates heavy parallelism, which significantly increases power consumption, especially during the acquisition...
In this paper, we study FPGA implementation of a novel receiver diversity combining technique, RMSGC for wireless transmission over fading channels in SIMO systems. Prior published results using ML-detected RMSGC diversity signal driven by BPSK showed superior bit error rate performance to classical diversity combining schemes. RMSGC was shown to be near-optimal in the sense that it was very close...
This paper describes a novel design approach for the DDS (direct digital synthesizer) required to correct the frequency shift in the received signal of a digital OFDM receiver. The traditional phase accumulator has been modified to perform modulus 2N-1 accumulation. This modification provides fine frequency tuning capabilities using a very small sine/cosine look-up-table. Current systems use hundreds...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.