1
Roger E J Gerard: Message signal scrambling apparatus. The Marconi Company, Diller Ramik & Wight, November 4, 1980: US04232193 (183 worldwide citation)

In a message signal scrambling apparatus, the signal is divided into elements, each of one time slot duration, and the elements are re-arranged in order so as to produce a signal scrambled in time. Each element is entered and stored in a charge coupled device, from which is extracted as required to ...


2
Robert Alan David Brash, William Bowring Stawell: Radar systems. The Marconi Company, Kirschstein et al, July 20, 1999: US05926128 (145 worldwide citation)

A target tracking radar system for a guided missile wherein sum and difference signals from a reception antenna are multiplexed at a variable rate into a single channel receiver, the multiplexing rate depending on an alternating reference signal. The output of the receiver is applied to a phase sens ...


3
Malcolm J Deacon: Impedance matching arrangement. The Marconi Company, Spencer & Frank, January 17, 1989: US04799066 (134 worldwide citation)

An impedance matching arrangement is suitable for use with a frequency hopping radio communications system which is operable over a wide frequency band, so as to match the operating impedance of the antenna at each of the frequencies used. As the frequency of the radio system hops from one frequency ...


4
William J Hall: Mode couplers. The Marconi Company, Diller Ramik & Wight, January 4, 1983: US04367446 (130 worldwide citation)

The invention provides a mode coupler arrangement comprising a main waveguide coupled via arrays of slots to two sets of subsidiary waveguides over a common length. One set of subsidiary waveguides is such as to support one mode of propagation and the other set another mode of propagation. In a pref ...


5
Stevens Arthur Dexter: Fault location and reconfiguration in redundant data processors. The Marconi Company, August 1, 1972: US3681578 (125 worldwide citation)

A data processing arrangement having three data processors, each with its own data store and each processing the same information is connected to a majority voting circuit. The majority voting circuit gives as an output that output of the majority of the processors. Whenever a processor output disag ...


6
Barry G West, Boleslaw M Sosin, Roger K Tolfree: Communication system. The Marconi Company, Lowe Price LeBlanc Becker & Shur, August 29, 1989: US04862453 (117 worldwide citation)

In a dynamic frame length slotted ALOHA system the synchronizing signals are transmitted by a base station at different frequencies (each having a period equivalent to a multiple of the time slot period). The different frequencies denote different frame lengths and the central stations detect these ...


7
Paul A Kennard, Stewart J R Hartley: Tropospheric scatter radio communication systems. The Marconi Company, Diller Ramik & Wight, February 24, 1981: US04253193 (115 worldwide citation)

A tropospheric scatter radio communication system uses a multiple signal diversity system in order to improve reliability of reception. A dual time diversity is used in which adjacent bits in a digital word are interleaved with bits from adjacent digital words so that more than one bit from a partic ...


8
Hari L Jairam: Tapered slot antenna with balun slot line and stripline feed. The Marconi Company, Kirschstein Ottinger Israel & Schiffmiller, July 30, 1991: US05036335 (106 worldwide citation)

An exponentially tapered slot (Vivaldi) antenna for producing an end-fire beam. The antenna features a novel balun for coupling with a feed line. The conventional Vivaldi antenna is fed by means of a stripline section (1) underlying the ground plane (5) and lying perpendicular to the axis of the slo ...


9
Nicholas G Kingsbury: Frequency synthesizer with fractional division ratio and jitter compensation. The Marconi Company, Kirschstein Kirschstein Ottinger & Cobrin, December 18, 1979: US04179670 (97 worldwide citation)

A frequency synthesizer in which good resolution is obtained by a unity increase of the dividing ratio for a controlled proportion of the reference frequency cycles thus giving a fractional dividing ratio. Phase jitter that could be expected to result is eliminated by keeping a running count of the ...


10
John H Dawson: Detection of narrow pulses. The Marconi Company, Diller Ramik & Wight, March 2, 1982: US04318047 (93 worldwide citation)

The invention is concerned with the detection of the presence of narrow pulses in an electrical signal such as that derived from a limited band width receiver. A first discriminator is provided for discriminating against pulses other than those having a ratio of amplitude to width characteristic of ...