公开(公告)号：US10110361B2

公开(公告)日：2018-10-23

申请号：US15123247

申请日：2015-03-04

Applicant: MEDIATEK INC. ,  Tianyu Wu ,  Jianhan Liu ,  Kiran Uln ,  Thomas Edward Pare, Jr.

Inventor： Tianyu Wu ,  Jianhan Liu ,  Kiran Uln ,  Thomas Edward Pare, Jr.

IPC: H04L5/00 ,  H04L25/02 ,  H04B17/24 ,  H04B17/336 ,  H04B7/0452 ,  H04B7/06 ,  H04L1/16 ,  H04B7/0417 ,  H04W72/04 ,  H04W72/08

Abstract: A method of sub-channel feedback in OFDMA systems is provided. A wireless receiving device (STA) receives a radio signal from a transmitting device (AP) over a wide channel in an OFDMA system. The radio signal is transmitted over multiple sub-channels of the wide channel. The STA estimates channel quality information based on the received radio signal for each sub-channel. The STA then sends feedback information to the transmitting device. The feedback information comprises the estimated channel quality information for a selected subset of sub-channels from the wide channel based on a predefined rule. In one embodiment, the feedback information is embedded within an ACK/BA frame or is carried in a frame immediately subsequent to the ACK/BA frame.

公开(公告)号：US09288715B2

公开(公告)日：2016-03-15

申请号：US14321618

申请日：2014-07-01

Applicant: Mediatek Inc.

Inventor： Kiran Uln ,  Thomas E. Pare, Jr. ,  Ravishankar H. Mahadevappa

IPC: H04W4/00 ,  H04W28/06 ,  H04L1/00

CPC classification number: H04W28/065 ,  H04L1/0069

Abstract: A method and system utilized in a wireless communication system transmitting and receiving a multi-user packet is disclosed. The communication system includes a transmitter and a plurality of users in communication therewith. The method and system comprise determining a lowest coding scheme for transmitting the packet; and deriving a coding rate for the efficient transmission of the packet from a standard coding rate by de-puncturing bits in the packet. A system and method in accordance with the present invention provides for an efficient utilization of packet length, and improves the reliability by improving SNR, by lowering the MCS, un-puncturing, and/or repetition. More efficient packed data rates are also provided and both Tx and Rx compute parameters independently.

Abstract translation: 公开了一种在发送和接收多用户分组的无线通信系统中使用的方法和系统。 通信系统包括与其通信的发射机和多个用户。 该方法和系统包括确定用于发送分组的最低编码方案; 并且通过对分组中的比特进行去穿孔来导出用于从标准编码率有效传输分组的编码率。 根据本发明的系统和方法提供了对分组长度的有效利用，并且通过降低MCS，非穿孔和/或重复来提高SNR，从而提高了可靠性。 还提供了更高效的打包数据速率，并且Tx和Rx独立地计算参数。

公开(公告)号：US09231839B1

公开(公告)日：2016-01-05

申请号：US14324258

申请日：2014-07-07

Applicant: MEDIATEK INC.

Inventor： Kuo-Hao Chen ,  Chun-Hao Liao ,  Kiran Uln ,  Shuling Feng

IPC: H04L12/26 ,  H04L27/00

CPC classification number: H04L27/2089 ,  H04L5/0023 ,  H04L27/2646 ,  H04L27/364

Abstract: A communication unit includes: a quadrature transmitter having analog transmit filter(s) for filtering a first quadrature test signal. An analog feedback loopback path selectively first routes the filtered quadrature first test signal to a quadrature receiver. The quadrature receiver has: at least one analog receive filter for further filtering the filtered quadrature first test signal; and a quadrature receive baseband circuit arranged to receive and decode the further filtered quadrature first test signal. The quadrature transmitter is arranged to receive a second quadrature test signal and the analog feedback loopback path selectively routes a filtered quadrature second test signal to the quadrature receiver via a second route such that the quadrature receive baseband circuit is arranged to determine a frequency-dependent quadrature imbalance of at least one component in the transmitter/receiver based on the decoded further filtered first quadrature test signal and the decoded further filtered second quadrature test signal.

Abstract translation: 通信单元包括：具有用于对第一正交测试信号进行滤波的模拟发射滤波器的正交发射机。 模拟反馈环回路径选择性地首先将滤波的正交第一测试信号路由到正交接收机。 正交接收机具有：至少一个模拟接收滤波器，用于进一步滤波滤波的正交第一测试信号; 以及正交接收基带电路，被布置为接收和解码进一步滤波的正交第一测试信号。 正交发射器被布置成接收第二正交测试信号，并且模拟反馈环回路径经由第二路径选择性地将经滤波的正交第二测试信号路由到正交接收机，使得正交接收基带电路被布置成确定频率相关的正交 基于解码的进一步滤波的第一正交测试信号和解码的进一步滤波的第二正交测试信号，发射机/接收机中的至少一个分量的不平衡。