1
Peter D Karabinis, Santanu Dutta, Gary G Churan, Dunmin Zheng: Intra- and/or inter-system interference reducing systems and methods for satellite communications systems. ATC Technologies, Myers Bigel Sibley & Sajovec PA, March 4, 2008: US07340213 (59 worldwide citation)

A first radio signal is received via a first satellite reception path, for example, an antenna or spot beam, which serves a satellite cell. The received first radio signal includes a desired satellite uplink signal transmitted from a first source using a frequency assigned to the satellite cell and ...


2
Habib Riazi, Zulfiquar Sayeed, Dunmin Zheng: Transmission frame structure for a satellite digital audio radio system. Agere Systems, September 9, 2003: US06618367 (41 worldwide citation)

A satellite digital audio radio system (SDARS) transmitter provides a broadcast transmission signal including a time division multiplex (TDM) mode of transmission and a coded orthogonal frequency multiplex (OFDM) mode of transmission. The SDARS transmitter provides a transmission signal that support ...


3
Habib Riazi, Zulfiquar Sayeed, Dunmin Zheng: Signal combining scheme for wireless transmission systems having multiple modulation schemes. Lucent Technologies, June 17, 2003: US06580705 (37 worldwide citation)

In a wireless transmission system that transmits the same information in parallel using two or more different types of modulation schemes, such as a satellite-based digital audio transmission system transmitting two TDM signals and a single OFDM signal, a receiver processes the differently modulated ...


4
Habib Riazi, Zulfiquar Sayeed, Dunmin Zheng: Cluster frame synchronization scheme for a satellite digital audio radio system. Agere Systems, September 28, 2004: US06798791 (37 worldwide citation)

A satellite digital audio radio system (SDARS) transmitter provides a broadcast transmission signal including a time division multiplex (TDM) mode of transmission and a coded orthogonal frequency multiplex (OFDM) mode of transmission. The SDARS transmitter provides a transmission signal that support ...


5
Dunmin Zheng, Peter D Karabinis: Adaptive beam forming with multi-user detection and interference reduction in satellite communication systems. ATC Technologies, Myers Bigel Sibley & Sajovec P A, October 12, 2010: US07813700 (32 worldwide citation)

Satellite communications methods include receiving communications signals including co-channel interference at a space-based component from a plurality of wireless terminals in a satellite footprint over a satellite frequency band and reducing interference in the communication signals by (a) perform ...


6
Peter D Karabinis, Dunmin Zheng: Communications systems including adaptive antenna systems and methods for inter-system and intra-system interference reduction. ATC Technologies, Myers Bigel Sibley & Sajovec P A, October 19, 2010: US07817967 (29 worldwide citation)

Methods of forming a downlink beam in an adaptive antenna system of a communications system that may reduce inter-system and/or intra-system interference include receiving vectors of signals including signals transmitted by user terminals of the communications system and signals transmitted by trans ...


7
Dunmin Zheng: Systems, methods and transceivers for wireless communications over discontiguous spectrum segments. ATC Technologies, Myers Bigel Sibley & Sajovec, July 5, 2011: US07974176 (28 worldwide citation)

Methods of transmitting a plurality of communications signals over a plurality of discontiguous bandwidth segments in a frequency band include defining a plurality (NFFT) of orthogonal subcarriers across the frequency band, defining a plurality (N) of available physical subcarriers from among the or ...


8
Dunmin Zheng, Michael Anthony Zuniga: Telephonic handset employing feed-forward noise cancellation. Lucent Technologies, M I Finston, April 18, 2006: US07031460 (26 worldwide citation)

A telephonic handset comprises an active noise reduction (ANR) system. The ANR system comprises a reference microphone and an IIR filter. The IIR filter is receivingly coupled to the reference microphone with respect to noise reference signals, and it is transmittingly coupled to the receiver transd ...


9
Dunmin Zheng: Systems and methods for satellite forward link transmit diversity using orthagonal space coding. ATC Technologies, Myers Bigel Sibley & Sajovec, July 12, 2011: US07979024 (15 worldwide citation)

Methods of transmitting communications signals from a satellite to a wireless terminal include determining a location of the wireless terminal, selecting a plurality of antenna feed elements at the satellite in response to the determined location of the wireless terminal, block coding a plurality of ...


10
Dunmin Zheng, Peter D Karabinis: Adaptive beam forming with multi-user detection and interference reduction in satellite communication systems and methods. ATC Technologies, Myers Bigel Sibley & Sajovec P A, June 3, 2014: US08744360 (12 worldwide citation)

Satellite communications methods include receiving communications signals including co-channel interference at a space-based component from a plurality of wireless terminals in a satellite footprint over a satellite frequency band and reducing interference in the communication signals by (a) perform ...