Patents

Redpine has focused on innovation through research in areas that include OFDM/OFDMA, MIMO, energy efficient wireless, wireless operation in dense environments, low power CMOS RF and high efficiency CMOS PAs.

Redpine has 51 awarded patents and over 100 in the pipeline.



# Patent Number Patent Name
1 7,593,456 Maximum likelihood block decision feedback estimation for CCK demodulation apparatus and method
2 7,218,896 Multiplexed wireless receiver and transmitter
3 7,295,144 Quantizer responsive to noise level for a wireless communications system
4 7,296,100 Packet buffer management apparatus and method
5 7,298,772 Packet detection, symbol timing, and coarse frequency estimation in an OFDM communications system
6 7,298,799 All-tap fractionally spaced, serial rake combiner apparatus and method
7 7,327,700 Flexible multi-channel multi-thread media access controller and physical layer interface for wireless networks
8 7,386,074 Digital automatic gain control method and apparatus
9 7,412,000 Maximum likelihood block decision feedback estimation for CCK demodulation apparatus and method
10 7,450,911 Multiplexed wireless receiver and transmitter
11 7,464,201 Packet buffer management apparatus and method
12 7,529,865 Packet buffer management apparatus and method
13 7,593,378 SINR-based powerdown apparatus and method for a wireless communications systems
14 7,593,459 Wireless link simulator
15 7,634,000 Noise estimator for a communications system
16 7,656,970 Apparatus for a wireless communications system using signal energy to control sample resolution and rate
17 7,657,683 Cross-thread interrupt controller for a multi-thread processor
18 7,761,688 Multiple thread in-order issue in-order completion DSP and micro-controller
19 7,844,007 Combined OFDMA preamble index identification, integer frequency offset estimation, and preamble CINR measurement
20 7,870,468 Reed-solomon decoder using a configurable arithmetic processor
21 7,907,555 RSSI-based powerdown apparatus and method for a wireless communications system
22 7,936,237 Multi-band transmit-receive switch for wireless transceiver
23 7,957,273 Packet re-transmission controller for block acknowledgement in a communications system
24 7,965,782 Reduced complexity maximum likelihood decoder for MIMO communications
25 7,986,738 Peak to average power ratio reduction apparatus and method for a wireless OFDM transmitter
26 8,005,179 Preamble detection in a multi-antenna MIMO 802.16e receiver
27 8,008,949 Clock selection for a communications processor having a sleep mode
28 8,0317,62 Stream weight estimation and compensation in SIMO/MIMO OFDM receivers
29 8,051,222 Concatenating secure digital input output (SDIO) interface
30 8,073,085 Analog to digital converter bit width and gain controller for a wireless receiver
31 8,077,591 Combined OFDMA preamble index identification, integer frequency offset estimation, and preamble CINR measurement
32 8,081,700 Power allocation method for MIMO transmit beamforming
33 8,090,035 Method for setting inter-packet gain
34 8,090,062 Process for packet detection
35 8,107,518 Stream weight estimation and compensation in SIMO/MIMO OFDM receivers
36 8,139,699 Process for preamble detection in a multi-stream 802.16E receiver
37 8,149,965 Level sensitive packet detector
38 8,149,966 Packet acquisition controller with signal strength threshold control for wireless MIMO receiver
39 8,151,155 Packet Re-transmission controller for block acknowledgement in a communications system
40 8,155,220 IIR transmit filter for OFDM baseband processor
41 8,160,190 IIR receive filter for OFDM baseband processor
42 8,161,205 Packet buffer management apparatus and method
43 8,165,251 Interpolation IIR filter for OFDM baseband processing
44 8,223,906 Interpolation IIR filter for OFDM baseband processing
45 8,245,063 Clock selection for a communications processor having a sleep mode
46 8,259,786 Channel estimation filter for OFDM receiver
47 8,332,451 Programmable CORDIC Processor
48 8,396,063 Multi-thread Media Access Controller with Per-thread MAC Address
49 8,446,996 Sampling resolution and gain controller for a wireless receiver
50 8,447,799 Process for QR transformation using a CORDIC processor
51 8,452,830 Programmable CORDIC processor with stage re-use