-
公开(公告)号：US10225122B2
公开(公告)日：2019-03-05
申请号：US15422755
申请日：2017-02-02
Applicant: MEDIATEK INC.
Inventor： Gary A. Anwyl , Jianhan Liu , Tianyu Wu , Thomas Edward Pare, Jr.
Abstract: Dual sub-carrier modulation (DCM) is introduced in high efficiency (HE) WLAN. DCM is a solution to deal with narrow band interferences and for range extension. DCM can introduce frequency diversity into OFDM systems by transmitting the same information on two subcarriers separated in frequency. If DCM is applied, then the transmitter modulates the same encoded bits onto two separated subcarriers with the same or different constellation mapping schemes. DCM suffers from a high peak-to-average power ratio (PAPR). In accordance with one novel aspect, a method of transmitting and encoding a HE PPDU frame with binary phase shift keying (BPSK) DCM and lower PAPR is proposed.
-
公开(公告)号：US20170104553A1
公开(公告)日：2017-04-13
申请号：US15290135
申请日：2016-10-11
Applicant: MEDIATEK INC.
Inventor： Jianhan Liu , Shengquan Hu , Tianyu Wu , Thomas Edward PARE, JR.
CPC classification number: H04L1/0041 , H04L27/0008 , H04L27/2601 , H04L27/2613 , H04L27/2626 , H04W72/0453 , H04W84/12
Abstract: A new lower density parity check (LDPC) tone mapper is proposed when DCM is applied for a given resource unit (RU) when LDPC is used as the channel control coding. For HE PPDU transmission with DCM, LDPC encoded streams are first modulated by a DCM constellation mapper. The modulated symbols of the lower half of the frequency segment and the modulated symbols of the upper half of the frequency segment are modulated using the same LDPC encoded bits using DCM mapping. The modulated symbols of the lower half of the frequency segment are mapped to lower half of the data subcarriers using DCM LDPC tone mapper. The modulated symbols of the upper half of the frequency segment are mapped to upper half of the data subcarriers using the same DCM LDPC tone mapper. Maximum frequency diversity for DCM can be achieved.
-
公开(公告)号：US20170070893A1
公开(公告)日：2017-03-09
申请号：US15121044
申请日：2015-02-24
Applicant: James June-Ming Wang , Jianhan Liu , Thomas Edward Pare, JR. , Tianyu Wu , Gabor Bajko , Yung-Ping Hsu , MEDIATEK INC.
Inventor： James June-Ming Wang , Jianhan Liu , Thomas Edward Pare Jr. , Tianyu Wu , Gabor Bajko , Yung-Ping Hsu
CPC classification number: H04W16/225 , G01S3/14 , G01S3/74 , G01S5/0252 , G01S5/06 , G01S5/12 , G01S13/825 , H04B7/0617 , H04B17/318 , H04L5/0048 , H04L5/005 , H04L69/22 , H04W4/02 , H04W4/023 , H04W4/043 , H04W24/10 , H04W64/00 , H04W84/12
Abstract: A method of direction finding (DF) positioning in a wireless location area network (WLAN) is proposed. A multiple antenna IEEE 802.11 transmitting device can transmit signal preamble containing multiple Long Training Field (LTF) symbols in a radio frame from multiple antennas simultaneously, which allows a receiving device to resolve multiple DF sounding signals transmitted from the multiple antennas. As a result, angle of departure (AoD) of the transmitting device can be estimated by using the multiple resolved DF sounding signals from each antenna for DF positioning purpose.
Abstract translation: 提出了一种在无线定位区域网络（WLAN）中的方向搜索（DF）定位的方法。 多天线IEEE 802.11发射设备可以同时在多个天线的无线帧中发送包含多个长训练场（LTF）符号的信号前导码，这允许接收设备解析从多个天线发送的多个DF探测信号。 结果，可以通过使用来自每个天线的多个分辨的DF探测信号来估计发射装置的出发角（AoD），用于DF定位目的。
-
公开(公告)号：US20160353275A1
公开(公告)日：2016-12-01
申请号：US15117448
申请日：2015-02-10
Applicant: Jianhan Liu , Tianyu Wu , Thomas Edward Pare Jr. , MEDIATEK INC.
Inventor： Jianhan Liu , Tianyu Wu , Thomas Edward Pare Jr.
IPC: H04W8/26 , H04L12/823 , H04W48/16
Abstract: A method for identifying source BSS in WLAN is proposed. A high efficiency (HE) access point (AP) sends a packet containing a basic service set (BSS) color to a HE station. The HE AP also sends a packet containing an assigned association identification (AID) to a very high throughput (VHT) station. The assigned AID comprises at least part of the BSS color information. The VHT station therefore sends a packet containing the at least part of the BSS color information such that any AP or station that receives the packet can determine the BSS the VHT station is in.
Abstract translation: 提出了一种识别WLAN中源BSS的方法。 高效（HE）接入点（AP）向HE站发送包含基本服务集（BSS）颜色的分组。 HE AP还将包含分配的关联标识（AID）的分组发送到非常高的吞吐量（VHT）站。 分配的AID包括BSS颜色信息的至少一部分。 因此，VHT站发送包含BSS颜色信息的至少一部分的分组，使得接收分组的任何AP或站可以确定VHT站所在的BSS。
-
25.发明申请公开(公告)号：US20160352552A1
公开(公告)日：2016-12-01
申请号：US15164690
申请日：2016-05-25
Applicant: MEDIATEK INC.
Inventor： Jianhan Liu , Tianyu Wu , Thomas Edward PARE, JR. , YungPing Hsu
IPC: H04L27/26 , H04L5/00 , H04B1/7176
Abstract: Modulation schemes that use dual sub-carrier to reliably transmit physical layer related signaling information and/or data in high efficiency wireless local area network (HE WLAN) are proposed. The proposed schemes can be implemented with low complexity and provide better performance than existing modulation schemes used in WLAN that are based on IEEE 802.11/a/b/g/n/ac standards. The proposed schemes enhance the reliability of transmissions, especially under narrow band interferences. In accordance with a novel aspect, dual subcarrier modulation (DCM) is introduced in HE WLAN. DCM can introduce frequency diversity into OFDM systems by transmitting the same information on two subcarriers separated in frequency. A DCM indication scheme is used such that both encoding and decoding of DCM is really simple.
Abstract translation: 提出了使用双子载波在高效率无线局域网（HE WLAN）中可靠传输物理层相关信令信息和/或数据的调制方案。 所提出的方案可以以低复杂度实现，并且比基于IEEE 802.11 / a / b / g / n / ac标准的WLAN中使用的现有调制方案提供更好的性能。 所提出的方案增强了传输的可靠性，特别是在窄带干扰下。 根据一个新颖的方面，在HE WLAN中引入了双副载波调制（DCM）。 DCM可以通过在频率上分离的两个子载波上发送相同的信息来将频率分集引入OFDM系统。 使用DCM指示方案，使得DCM的编码和解码都非常简单。
-
Patent Agency Ranking
公开(公告)号：US20170093546A1
公开(公告)日：2017-03-30
申请号：US15278031
申请日：2016-09-28
Applicant: MEDIATEK INC.
Inventor： Tianyu Wu , Jianhan Liu , Shengquan Hu , Thomas Edward PARE, JR.
IPC: H04L5/00
Abstract: Methods and apparatus are provided for structured resource allocation signaling. In one novel aspect, an 8-bit RU allocation filed is allocated in the HE-SIG-B common field for each 20 MHz. The structured resource signaling supports more than four MU-MIMO users. In one embodiment, the STA decodes the 8-bit RU allocation signal following a structured resource unit (RU) allocation rule, and determines the RU. In one embodiment, the STA decodes the first two bits of the 8-bit RU allocation signal to determine a first category of the RU allocation. The categories of the RU allocation includes a large RU size category indicating larger than or equal to 20 MHz RUs exist, a two 106-tone category indicating two 106-tone RUs exist, and a no-large-RU category indicating only smaller-than-242-tone RUs exist. The STA further decodes based on the category. A lookup table (LUT) for RU allocation is built and decoded based on a structured signaling rule.
-
27.发明申请公开(公告)号：US20160366548A1
公开(公告)日：2016-12-15
申请号：US15121049
申请日：2015-02-24
Applicant: James June-Ming Wang , Jianhan Liu , Thomas Edward Pare Jr. , Tianyu Wu , Gabor Bajko , Yung-Ping Hsu , MEDIATEK INC.
Inventor： James June-Ming Wang , Jianhan Liu , Thomas Edward Pare, JR. , Tianyu Wu , Gabor Bajko , Yung-Ping Hsu
Abstract: A method of combined direction finding (DF) and fine timing measurement (FTM) positioning in a wireless location area network (WLAN) is proposed. A multiple antenna IEEE 802.11 transmitting device (AP) can transmit signal preamble containing multiple Long Training Field (LTF) symbols in a radio frame from multiple antennas, which allows a receiving device (STA) to resolve multiple DF sounding signals transmitted from the multiple antennas and thereby estimating angle of departure (AoD). On the other hand, the AP can estimate angle of arrival (AoA) from radio signals transmitted from the STA. When the radial resolution error of AoD or AoA positioning increases, DF positioning and fine-timing measurement (FTM) ranging can be jointly applied to reduce the radial resolution error and extends the AoD/AoA service area with positing accuracy.
Abstract translation: 提出了一种在无线定位区域网络（WLAN）中组合方向搜索（DF）和精确定时测量（FTM）定位的方法。 多天线IEEE 802.11发射设备（AP）可以在来自多个天线的无线帧中发送包含多个长训练场（LTF）符号的信号前导码，这允许接收设备（STA）解析从多个天线发送的多个DF探测信号 从而估计出发角度（AoD）。 另一方面，AP可以从STA发送的无线电信号估计到达角（AoA）。 当AoD或AoA定位的径向分辨率误差增大时，可以共同应用DF定位和精确定时测量（FTM）测距，以减小径向分辨率误差，并以准确的精度扩展AoD / AoA服务区域。
-
公开(公告)号：US20150296530A1
公开(公告)日：2015-10-15
申请号：US14682126
申请日：2015-04-09
Applicant: MEDIATEK INC.
Inventor： Tianyu Wu , Jianhan Liu , Thomas Edward Pare, JR.
CPC classification number: H04W52/0216 , H04W52/0229 , H04W72/042 , H04W76/28 , Y02D70/142
Abstract: A method for downlink traffic priority indication is provided. A wireless device, such as an access point, receives signals destined to a first wireless station and a second wireless station. Since the first wireless station and the second wireless station are associated with the wireless device, the wireless device sends a notice signal to the first wireless station and the second wireless device to inform about the signals. The notice signal sent by the wireless device includes downlink priority information according to the signals such that the wireless stations can manage the downlink traffic accordingly.
Abstract translation: 提供了一种用于下行链路业务优先级指示的方法。 诸如接入点的无线设备接收去往第一无线站和第二无线站的信号。 由于第一无线站和第二无线站与无线设备相关联，所以无线设备向第一无线站和第二无线设备发送通知信号以通知信号。 由无线设备发送的通知信号包括根据信号的下行链路优先级信息，使得无线站可以相应地管理下行链路业务。
-
公开(公告)号：US11019559B2
公开(公告)日：2021-05-25
申请号：US15372983
申请日：2016-12-08
Applicant: MEDIATEK INC.
Inventor： Tianyu Wu , Chao-Chun Wang , Chien-Fang Hsu , James June-Ming Wang , Jianhan Liu , Thomas Edward Pare, Jr.
Abstract: A method of very high throughput (VHT) operation information subfields design for IEEE 802.11 WLAN is proposed. The VHT operation information subfields comprise a channel width, a channel center frequency segment 0 (CCFS0), and a channel center frequency segment 1 (CCFS1). Multiple definitions of the VHT operation information subfields have been adopted by different access points (AP)s and wireless stations (STAs). In accordance with one novel aspect, upon receiving the VHT operation information element broadcasted by an AP, an STA will first check the channel width indicated by the AP. The STA then follows different definitions under different channel widths. Under such method, the STA can support up to 160 MHz operation mode with APs following different definitions and operating up to 160 MHz mode.
-
公开(公告)号：US10211948B2
公开(公告)日：2019-02-19
申请号：US15290135
申请日：2016-10-11
Applicant: MEDIATEK INC.
Inventor： Jianhan Liu , Shengquan Hu , Tianyu Wu , Thomas Edward Pare, Jr.
Abstract: A new lower density parity check (LDPC) tone mapper is proposed when DCM is applied for a given resource unit (RU) when LDPC is used as the channel control coding. For HE PPDU transmission with DCM, LDPC encoded streams are first modulated by a DCM constellation mapper. The modulated symbols of the lower half of the frequency segment and the modulated symbols of the upper half of the frequency segment are modulated using the same LDPC encoded bits using DCM mapping. The modulated symbols of the lower half of the frequency segment are mapped to lower half of the data subcarriers using DCM LDPC tone mapper. The modulated symbols of the upper half of the frequency segment are mapped to upper half of the data subcarriers using the same DCM LDPC tone mapper. Maximum frequency diversity for DCM can be achieved.
-
-
-
-
-
-
-
-
-
Search Results
34
records
(took 0.017 seconds)
