GL Conveys the Availability of RF Design Tools

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GL Communications Inc. conveyed today the availability of its RF Design Tools– that help engineers to design commercial and public safety land mobile radio systems and microwave networks.

Typical Microwave Path Profile Tool

RF design tools and optimization software help engineers design and analyze radio networks in order to ensure that they meet stringent quality and reliability requirements per ITU and other industry standards.

GL Communications Inc. a leader in providing PC-based test, analysis and simulation products and consulting services to the worldwide telecommunications industry, conveyed today the availability of its RF Design Tools– that help engineers to design commercial and public safety land mobile radio systems and microwave networks.

Speaking to the press, Mr. Vijay Kulkarni, CEO of the company said, “RF design tools and optimization software help engineers design and analyze radio networks in order to ensure that they meet stringent quality and reliability requirements per ITU and other industry standards. Some of the important RF design tools are: RF Propagation Studies, Microwave Path Profiles and Intermodulation Interference Studies.”

He explained, “RF propagation is the transmission of radio signals from a transmitter to a receiver. The characteristics of a propagating RF signal largely depends on the radio frequency, geographic terrain, foliage, buildings, and varying weather conditions. Radio network designers would like to predict RF coverage based on a set of proposed system requirements that also include proposed site locations, antennas, and radiating power and other such parameters. Such a prediction helps determine whether the intended service objectives can be met.

Microwave Path Profiles: In designing a microwave link, engineers consider if the terrain/path between two ends of a link is likely to interfere with the propagation. A path profile uses topographical information and Fresnel diffraction impact to plot ground elevation in the path between two microwave sites. Using the path profile tool, antenna placement and its elevation can be determined to provide a line of sight with the desired level of reliability. Computer generated plots help determine a line of sight path, thus avoiding time consuming plots by hand and reducing the need for detailed site surveys. Once a suitable path is established and it has to be verified by "walking the path", or performing a path survey, to ensure that vegetation, buildings, and other obstructions do not interfere with the microwave link path.

Intermodulation interference (IM) is a common cause of interference in radio systems. It may occur when a receiver receives two or more signals at different frequencies. Due to non-linear characteristics of receiver components, in addition to the signal at the desired frequency, undesired signals are produced at frequencies that are sum and difference of the input frequencies. These undesired signals are called IM products. IM analysis should be performed when more than one frequency is transmitted from a platform and whenever new transmit or receive frequencies are added to a platform.”

Mr. Kulkarni further added, “In addition to the above tools, GL has developed, in house, an extensive array of advanced wireless system design tools. They include Geographic Plotting of GPS based data for drive testing and evaluations, microwave Inter-connect, erlang calculator, RF coverage, 2D and 3D terrain maps, service area boundary contours study, TV station Grade-B contour interference analysis, adjacent and co-channels interference analysis, carrier-to-Interferer Ratio Plots.”

About GL Communications Inc.,

Founded in 1986, GL Communications Inc. Provides technical consulting, engineering and testing services in wireless, telecom, and IT disciplines. Our customers include telecom wireless and landline carriers, mass transit and public safety systems nationwide. We have designed hundreds of wired and wireless telecom network systems.

GL is a DBE/MBE firm certified by Maryland's Department of Transportation (MDOT), Washington Metropolitan Area Transit Authority (WMATA), Virginia Department of Transportation (VDOT), and South Eastern Pennsylvania Transportation Authority (SEPTA).

GL’s TDM Analysis & Emulation line of products includes T1, E1, T3, E3, OC-3, OC-12, STM-1, STM-4, analog four-wire, and analog two-wire interface cards, external portable pods, and complete system solutions. Capabilities include voiceband traffic analysis and emulation across all traffic types (voice, digits, tones, fax, modem), all protocols (ISDN, SS7, GR-303, Frame Relay, HDLC, V5.X, ATM, GSM, GPRS, LTE, etc.), and with capacities up to thousands of channels. Our newest products provide astonishing capacity and capture capability up to and including gigabit speeds.

GL’s VoIP and IP products generate / analyze thousands of calls and traffic simultaneously with traffic types such as frames, packets, voice files, digits, video, tones, noise, and fax. Almost all codecs are supported including G.711, G.729, AMR, EVRC-A, B, C, GSM, iSAC, and many more. Additional features include visual analysis, real-time listening, and recording. The product line also includes Ethernet / IP Testing capability that simulates and checks frame transport and throughput parameters of Ethernet and IP networks, including delay, errors and other impairments.

GL's Voice Quality Testing (VQT) product line complements all of GL's products. Using ITU-standard algorithms (PAMS, PSQM, and PESQ), GL's VQT provides a widely accepted solution for assessing voice quality in the telecom industry. Voice Quality Testing across multiple networks (T1, E1, T3, E3, OC-3, OC-12, VoIP, Wireless, and Landline) is available.

GL’s Wireless Products perform protocol analysis and voice quality assessment on GSM, CDMA, UMTS, and LTE networks. Connections can be made to any wireless phone with automated call control, GPS mapping and real-time signal measurements.

GL’s Echo Canceller testing solutions provide the broadest range of simulation and analysis, including line and acoustic echo. GL’s compliance testing per G.168. G.167 and P.340 across TDM, IP, VoIP and Wireless networks is widely accepted in the industry.

GL’s wireless VQT solutions help assessing impairments to voice quality such as poor mobile phone quality, voice compression and decompression algorithms, delay, loss and gain in speech levels, noise, acoustic and landline echo, and other distortions are easily assessed and accurately measured.

GL’s Handheld data testers can test a wide variety of communications facilities and equipment including T1, fractional T1, E1, fractional E1, T3 and E3 modems, multiplexers, CSU, DSUs, T1 CSUs, DTUs, NTUs and TIUs and more. The testers provide convenience, economy, and portability for almost any interface, including RS232, RS-422, RS-530, X.21, T1, E1, T3, E3, and many others.

GL’s Network Surveillance and Monitoring products include Probes for TDM, IP, VoIP, ATM, and Wireless networks. An open standards based approach provides a scalable, feature rich, real-time access to network characteristics. Centralized or distributed access, efficient transport and database loading allow compatibility with 3rd party and standards based monitoring systems.

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