Systems http://mwrf.com/taxonomy/term/6599/more en Automate RF Matrix Switching for Wireless Test http://mwrf.com/test-measurement/automate-rf-matrix-switching-wireless-test <div class="node-body article-body">The automation of RF test systems—especially for the verification testing of wireless handsets and network devices—promises to save time while improving accuracy for common repetitive test configurations. RF switching matrix devices could be a critical aspect in improving the reliability factor of these setups.</div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/test-measurement/automate-rf-matrix-switching-wireless-test" target="_blank">read more</a></p> http://mwrf.com/test-measurement/automate-rf-matrix-switching-wireless-test#comments Commercial Systems Test & Measurement Fri, 21 Nov 2014 20:59:00 +0000 29871 at http://mwrf.com <p>Cell-tower handoff testing is performed using a shielded chamber that precisely injects the signals of an emulated handoff scenario.</p> For Long-Range Communications, Is Narrowband “It”? http://mwrf.com/active-components/long-range-communications-narrowband-it <div class="node-body article-body">For reliable and efficient long-range RF communications, narrowband systems may be a prime choice. A comparison of spectral efficiency, coexistence, and battery lifetime between narrowband communications and coding-gain techniques could demonstrate narrowband technique’s superiority for certain applications.</div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/active-components/long-range-communications-narrowband-it" target="_blank">read more</a></p> http://mwrf.com/active-components/long-range-communications-narrowband-it#comments Active components Commercial Defense Systems Fri, 21 Nov 2014 20:34:00 +0000 29881 at http://mwrf.com DARPA Advances Microwave Photonics http://mwrf.com/systems/darpa-advances-microwave-photonics <div class="node-body article-body">DARPA-funded research efforts have led to many discoveries and advancements in microwave-photonic components, such as electro-optic modulators, high-power photodiodes, low-noise laser diodes, and microwave photonic link configurations. </div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/systems/darpa-advances-microwave-photonics" target="_blank">read more</a></p> http://mwrf.com/systems/darpa-advances-microwave-photonics#comments Commercial Defense Systems Fri, 21 Nov 2014 15:10:00 +0000 29831 at http://mwrf.com Algorithm Aids RFID Anti-Collision Success http://mwrf.com/systems/algorithm-aids-rfid-anti-collision-success <div class="field-byline"> Guihua Yang, Junchi Ma, Yukai Gao, Baohong Fu, and Chunmei Wu </div> <div class="field-deck"> This algorithm was developed to enhance the operation of RFID systems by properly identifying tags, even under spectrally dense conditions where collisions can occur. </div> <div class="node-body article-body">This algorithm combines several benefits to efficiently and effectively identify tags in RFID systems.</div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/systems/algorithm-aids-rfid-anti-collision-success" target="_blank">read more</a></p> http://mwrf.com/systems/algorithm-aids-rfid-anti-collision-success#comments Commercial Defense Industrial Systems Mon, 17 Nov 2014 19:24:00 +0000 29541 at http://mwrf.com FPGA-Based System Helps Validate VMCK http://mwrf.com/systems/fpga-based-system-helps-validate-vmck <div class="field-byline"> Liu Yang, Guoxin Zheng, and Zhongpin Luo </div> <div class="field-deck"> Advanced modulation/demodulation formats such as very-minimum-chirp-keying (VMCK) approaches can be produced by means of FPGA-based experimental circuits. </div> <div class="node-body article-body">Advanced very-minimum-chirp-keying (VMCK) modulation is evaluated in an experimental system and model. </div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/systems/fpga-based-system-helps-validate-vmck" target="_blank">read more</a></p> http://mwrf.com/systems/fpga-based-system-helps-validate-vmck#comments Commercial Systems Mon, 17 Nov 2014 15:35:00 +0000 29521 at http://mwrf.com What’s the Difference Between Broadband and Narrowband RF Communications? http://mwrf.com/systems/what-s-difference-between-broadband-and-narrowband-rf-communications <div class="field-deck"> The debate between broadband and narrowband communication techniques is leaving many engineers and radio-deployment specialists debating the benefits of enhanced data rates and long-range reliable communication links. </div> <div class="node-body article-body">Substantial tradeoffs arise when choosing between a narrowband or broadband architecture for radio deployments. These tradeoffs largely depend upon the requirements of the application and type of communications system, data rate, power specification, and range requirements. </div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/systems/what-s-difference-between-broadband-and-narrowband-rf-communications" target="_blank">read more</a></p> http://mwrf.com/systems/what-s-difference-between-broadband-and-narrowband-rf-communications#comments Active components Commercial Defense Systems Fri, 14 Nov 2014 20:13:00 +0000 29581 at http://mwrf.com Fabricate Low-Spurious PLL Synthesizers http://mwrf.com/systems/fabricate-low-spurious-pll-synthesizers <div class="field-byline"> Fang Rui, Qian Huan-Yu, and Wu Guo-An </div> <div class="field-deck"> An approach based on the use of variable reference frequencies helps improve the spurious noise performance of fractional phase-lock-loop frequency synthesizers. </div> <div class="node-body article-body">The use of an adjustable reference-frequency approach can help reduce the spurious noise in a fractional-N frequency synthesizer.</div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/systems/fabricate-low-spurious-pll-synthesizers" target="_blank">read more</a></p> http://mwrf.com/systems/fabricate-low-spurious-pll-synthesizers#comments Commercial Industrial Systems Mon, 10 Nov 2014 21:52:00 +0000 29511 at http://mwrf.com RF Development Platform Supports Metering Applications http://mwrf.com/systems/rf-development-platform-supports-metering-applications <div class="node-body article-body">Semtech and other members of the Wi-SUN Alliance jointly created an RF development platform, replete with an RF transceiver and MCU, for metering applications.</div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/systems/rf-development-platform-supports-metering-applications" target="_blank">read more</a></p> http://mwrf.com/systems/rf-development-platform-supports-metering-applications#comments News Commercial Systems Fri, 17 Oct 2014 19:42:00 +0000 29321 at http://mwrf.com Network-Edge Battery Technology Uses Existing Copper Cables http://mwrf.com/systems/network-edge-battery-technology-uses-existing-copper-cables <div class="node-body article-body">The LPS04 dc-dc converter and Aggregator allow carriers to use their embedded copper cables to power remote devices from central-office power plants.</div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/systems/network-edge-battery-technology-uses-existing-copper-cables" target="_blank">read more</a></p> http://mwrf.com/systems/network-edge-battery-technology-uses-existing-copper-cables#comments News Systems Thu, 16 Oct 2014 16:01:00 +0000 29271 at http://mwrf.com <p>With the LPS04 and Aggregator, carriers can use their embedded copper cables to power remote devices from central-office power plants. (Image courtesy of Thinkstock)</p> Advanced Routers to Strengthen Patriot Missile Prowess http://mwrf.com/systems/advanced-routers-strengthen-patriot-missile-prowess <div class="node-body article-body">Engineers from Raytheon and TELDAT will work together to develop and produce advanced militarized routers with expanded controls for the Patriot Air and Missile Defense (AMD) system.</div> <div class="og_rss_groups"></div><p><a href="http://mwrf.com/systems/advanced-routers-strengthen-patriot-missile-prowess" target="_blank">read more</a></p> http://mwrf.com/systems/advanced-routers-strengthen-patriot-missile-prowess#comments News Defense Systems Thu, 16 Oct 2014 15:39:00 +0000 29261 at http://mwrf.com <p>With more than 200 fire units fielded worldwide, Patriot is the system of choice for 12 nations around the globe. (Image courtesy of Raytheon)</p>