1
Kyoung Joon Cho, Wan Jong Kim, Shawn Patrick Stapleton: N-way Doherty distributed power amplifier with power tracking. Dali Systems, Kilpatrick Townsend & Stockton, September 25, 2012: US08274332 (75 worldwide citation)

A power amplifier using N-way Doherty structure with adaptive bias supply power tracking for extending the efficiency region over the high peak-to-average power ratio of the multiplexing modulated signals such as wideband code division multiple access and orthogonal frequency division multiplexing i ...


2
Shawn Patrick Stapleton, Paul Lemson, Bin Lin, Albert S Lee: Daisy-chained ring of remote units for a distributed antenna system. Dali Systems, Kilpatrick Townsend & Stockton, May 27, 2014: US08737300 (34 worldwide citation)

The present disclosure is a novel utility of a software defined radio (SDR) based Distributed Antenna System (DAS) that is field reconfigurable and support multi-modulation schemes (modulation-independent), multi-carriers, multi-frequency bands and multi-channels. More specifically, the present inve ...


3
Wan Jong Kim, Kyoung Joon Cho, Jong Heon Kim, Shawn Patrick Stapleton: Method and system for baseband predistortion linearization in multi-channel wideband communication systems. Dali Systems, Kilpatrick Townsend & Stockton, April 3, 2012: US08149950 (25 worldwide citation)

An efficient baseband predistortion linearization method for reducing the spectral regrowth and compensating memory effects in wideband communication systems using effective multiplexing modulation technique such as wideband code division multiple access and orthogonal frequency division multiplexin ...


4
Wan Jong Kim, Kyoung Joon Cho, Shawn Patrick Stapleton, Jong Heon Kim: N-way Doherty distributed power amplifier. Dali Systems, James E Eakin, March 30, 2010: US07688135 (21 worldwide citation)

A power amplifier using N-way Doherty structure for extending the efficiency region over the high peak-to-average power ratio of the multiplexing modulated signals such as wideband code division multiple access and orthogonal frequency division multiplexing is disclosed. In an embodiment, the presen ...


5
Wan Jong Kim, Kyoung Joon Cho, Shawn Patrick Stapleton: Multi-band wideband power amplifier digital predistorition system and method. Dali Systems Co Ltfd, Kilpatrick Townsend & Stockton, January 8, 2013: US08351877 (21 worldwide citation)

A high performance and cost effective method of RF-digital hybrid mode power amplifier systems with high linearity and high efficiency for multi-frequency band wideband communication system applications is disclosed. The present disclosure enables a power amplifier system to be field reconfigurable ...


6
Paul Lemson, Shawn Patrick Stapleton, Sasa Trajkovic, Albert S Lee: Remotely reconfigurable distributed antenna system and methods. Dali Systems, Kilpatrick Townsend & Stockton, March 25, 2014: US08682338 (20 worldwide citation)

The present disclosure is a novel utility of a software defined radio (SDR) based Distributed Antenna System (DAS) that is field reconfigurable and support multi-modulation schemes (modulation-independent), multi-carriers, multi-frequency bands and multi-channels. The present disclosure enables a hi ...


7
Wan Jong Kim, Kyoung Joon Cho, Shawn Patrick Stapleton, Ying Xiao: High efficiency, remotely reconfigurable remote radio head unit system and method for wireless communications. Dali Systems, Kilpatrick Townsend & Stockton, September 24, 2013: US08542768 (16 worldwide citation)

A remote radio head unit (RRU) system for achieving high efficiency and high linearity in wideband communication systems is disclosed. The present invention is based on the method of adaptive digital predistortion to linearize a power amplifier inside the RRU. The power amplifier characteristics suc ...


8
Wan Jong Kim, Shawn Patrick Stapleton: Baseband-derived RF digital predistortion. Dali Systems, Kilpatrick Townsend and Stockton, March 19, 2013: US08401499 (14 worldwide citation)

A baseband-derived RF predistortion system using a lookup table having coefficients extracted at baseband and then applied at RF by means of a vector modulator. The architecture combines the narrowband advantage of envelope predistortion with the accuracy of baseband predistortion, and including com ...


9
Seyed Amin Hejazi, Shawn Patrick Stapleton: Method and system for soft frequency reuse in a distributed antenna system. Dali Systems, Kilpatrick Townsend & Stockton, November 24, 2015: US09197358 (14 worldwide citation)

A method for routing and switching operator RF signals includes providing one or more Digital Remote Units (DRUs) and providing at least one Digital Access Unit (DAU) configured to communicate with at least one of the one or more DRUs. A first DRU is operable to communicate using a first set of freq ...


10
Shawn Patrick Stapleton, Wan Jong Kim: Software configurable distributed antenna system and method for bandwidth compression and transport of signals in noncontiguous frequency blocks. Dali Systems, Kilpatrick Townsend & Stockton, May 13, 2014: US08724664 (13 worldwide citation)

A method for transporting communications signals includes receiving an analog IF signal at a first unit. The analog IF signal includes a first carrier having a first frequency and a first bandwidth and a second carrier having a second frequency different from the first frequency and a second bandwid ...



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