1
Daniel D McRae, William N Furman: Frequency management system for use in multistation H.F. communication network. Harris Corporation, Antonelli Terry & Wands, October 3, 1989: US04872182 (102 worldwide citation)

A frequency management scheme for a multistation H.F. communication network establishes communication channels among network stations over respective ones of K frequencies, so that network stations may communicate with one another. Any station desiring to communicate with another station, repeatedly ...


2
Daniel D McRae, George C Clark, Nicholas C Szuchy: Technique for high rate digital transmission over a dynamic dispersive channel. Harris Corporation, Antonelli Terry & Wands, December 21, 1982: US04365338 (90 worldwide citation)

In a communication system for transmitting information over a dispersive link, a transmitted message is assembled to contain alternately arranged known and unknown pluralities of data symbols. At the transmitter, the known data symbols may be produced by a maximal length PN sequence generator, with ...


3
Daniel D McRae, Frank A Perkins, Edward B Glover: Apparatus for privacy transmission in system having bandwidth constraint. Harris Corporation, Yount & Tarolli, August 9, 1983: US04398062 (26 worldwide citation)

Source intelligence within a predetermined bandwidth is normally provided to a transmission channel having a bandwidth constraint of the predetermined bandwidth. For privacy transmission, a first pulse train indicative of the source intelligence is derived and is enciphered by addition of pseudo-ran ...


4
Daniel D McRae, Joseph B Cain III: HF avalanche relay communication technique. Harris Corporation, Antonelli Terry and Wands, January 27, 1987: US04639937 (25 worldwide citation)

An "avalanche" relay communication network is configured of a plurality of transceiver stations spread out over a geographic area of interest to establish multipath communication diversity among the stations. The transceiver equipment at each station has the capability of simultaneous transmission o ...


5
Daniel D McRae: Technique for controlling memoryful non-linearities. Harris Corporation, Craig and Antonelli, July 31, 1979: US04163209 (22 worldwide citation)

The influence of memoryful non-linearities on a serial data sequence is combatted by initially analyzing a transmitted test or training data sequence, the contents of which are known and, from this analysis, a decoding scheme, referred to as a look-up table, is prepared. The look-up table contains a ...


6
Daniel D McRae, Frank A Perkins: Technique for obtaining symbol timing for equalizer weights. Harris Corporation, Craig & Antonelli, March 27, 1979: US04146840 (22 worldwide citation)

An equalizer-dependent timing recovery system monitors the equalizer weighting coefficient pattern over the entire time span of the equalizer, and differential changes at opposite ends of the pattern are used as a basis for adjusting the receiver symbol timing clock. The magnitudes of a plurality of ...


7
Daniel D McRae: Technique for tracking amplitude fades for multi-amplitude signalling. Harris Corporation, Craig and Antonelli, July 17, 1979: US04161628 (21 worldwide citation)

Amplitude variations in a multi-amplitude transmission system are tracked by monitoring amplitude variations over a substantial data time span through the use of a technique in which the percentage of time that a maximum-valued reference amplitude is exceeded is made equal to the percentage of time ...


8
Daniel D McRae: Technique for combatting jitter in multiple phase transmission system. Harris Corporation, Craig & Antonelli, March 27, 1979: US04146841 (15 worldwide citation)

To eliminate the effects of phase jitter, successively measured phase values received in an N-phase transmission system are stored and compared with a phase node reference plot to derive values representative of the respective phase nodes to which the measured phase values are closest and the degree ...


9
Earl F Smith, Daniel D McRae: Phase tracking correction scheme for high frequency modem. Harris Corporation, Antonelli Terry & Wands, May 8, 1984: US04447910 (12 worldwide citation)

An auxiliary phase tracking subsystem for compensating for fast phase changes in an adaptive transversal filter obtains a measure, from the received signal, of channel phase variations and corrects the phase of each received sample in accordance with this phase measure. The channel tracking weights ...


10
Daniel D McRae: Cascaded equalizer technique. Harris Corporation, Craig & Antonelli, November 11, 1980: US04233683 (6 worldwide citation)

Equipment-generated and dynamic crosstalk are effectively compensated by a signal equalization technique which involves the cascading of equalizers of respectively different lengths and respectively different loop gains. The first equalizer to which a received data sequence is applied is a long equa ...