公开(公告)号：US09281861B2

公开(公告)日：2016-03-08

申请号：US13793936

申请日：2013-03-11

Applicant: QUALCOMM Incorporated

Inventor： Samir Soliman ,  Ozgur Dural ,  Krishnan Rajamani ,  Rabih Chrabieh

IPC: H04B1/00 ,  H04B1/69 ,  H04B1/719 ,  H04B1/7163

CPC classification number: H04B1/69 ,  H04B1/71635 ,  H04B1/71637 ,  H04B1/719

Abstract: Low-power transmitter and/or receiver devices are provided by sacrificing time and/or frequency diversity in exchange for lower power consumption. When channel conditions indicate that time and/or frequency spreading are unnecessary for transmissions, a transmitter may enter into a power-conservation mode in which transmissions are performed using a time gating scheme or a time repetition scheme. In the time gating scheme, symbols are transmitting just once, rather than a plurality of times, but with increased transmission power. In the time repetition scheme, copies of the same symbol are transmitted a plurality of times on the same frequency on different symbol transmission periods, instead of being retransmitted on different frequencies on different symbol transmission periods. Consequently, the symbol can be generated once and stored for subsequent retransmission, thereby allowing some of the transmitter/receiver chain components can be operated at a lower duty cycle or processing speed to conserve power.

公开(公告)号：US08737548B2

公开(公告)日：2014-05-27

申请号：US13793842

申请日：2013-03-11

Applicant: QUALCOMM Incorporated

Inventor： Rabih Chrabieh ,  Samir S. Soliman ,  Ozgur Dural

IPC: H03D1/04 ,  H04B1/10

CPC classification number: H04W28/08 ,  H04L5/0007 ,  H04L5/0046 ,  H04L5/0064 ,  H04L5/0085

Abstract: An orthogonal frequency division multiplex (OFDM) transmitter may adaptively load each sub-carrier, buffering less than an OFDM frame in order to reduce hardware requirements and latency. The transmitter may use feedback information from the receiver regarding the quality of the sub-carriers. In addition, combining repetition and puncturing to achieve a desired date rate per class further reduces hardware by simplifying or even eliminating an interleaver. Additional mitigation and even performance enhancement techniques are incorporated to address inter-class boundaries within an OFDM frame, such as introducing transition classes. Channel state information may be reported in various formats including full bitmap, changed subchannels, and reported bad subchannels.

Abstract translation: 正交频分复用（OFDM）发射机可以自适应地加载每个子载波，缓冲小于OFDM帧，以便减少硬件要求和等待时间。 发射机可以使用来自接收机的关于子载波的质量的反馈信息。 此外，组合重复和删截以实现每个类别的所需日期速率通过简化或甚至消除交织器来进一步降低硬件。 并入了额外的缓解和甚至性能增强技术来解决OFDM帧内的类间边界，例如引入转换类。 信道状态信息可以以各种格式报告，包括完整的位图，改变的子信道和报告的坏子信道。

公开(公告)号：US20130195145A1

公开(公告)日：2013-08-01

申请号：US13793936

申请日：2013-03-11

Applicant: QUALCOMM Incorporated

Inventor： Samir Soliman ,  Ozgur Dural ,  Krishnan Rajamani ,  Rabih Chrabieh

IPC: H04B1/69

CPC classification number: H04B1/69 ,  H04B1/71635 ,  H04B1/71637 ,  H04B1/719

Abstract: Low-power transmitter and/or receiver devices are provided by sacrificing time and/or frequency diversity in exchange for lower power consumption. When channel conditions indicate that time and/or frequency spreading are unnecessary for transmissions, a transmitter may enter into a power-conservation mode in which transmissions are performed using a time gating scheme or a time repetition scheme. In the time gating scheme, symbols are transmitting just once, rather than a plurality of times, but with increased transmission power. In the time repetition scheme, copies of the same symbol are transmitted a plurality of times on the same frequency on different symbol transmission periods, instead of being retransmitted on different frequencies on different symbol transmission periods. Consequently, the symbol can be generated once and stored for subsequent retransmission, thereby allowing some of the transmitter/receiver chain components can be operated at a lower duty cycle or processing speed to conserve power.

Abstract translation: 通过牺牲时间和/或频率分集来提供低功率发射机和/或接收机设备，以换取更低的功耗。 当信道条件指示时间和/或频率扩展对于传输是不必要的时，发射机可以进入其中使用时间选通方案或时间重复方案执行传输的功率节约模式。 在时间选通方案中，符号只传输一次，而不是多次，但是传输功率增加。 在时间重复方案中，相同符号的副本在不同的符号传输周期上以相同频率发送多次，而不是在不同的符号传输周期上在不同的频率上重发。 因此，可以生成符号一次并存储以用于随后的重传，从而允许一些发送器/接收器链组件可以以较低的占空比或处理速度操作以节省功率。