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1. 发明授权

US10595232B2 Wireless communication device and method of controlling same 有权
公开(公告)号：US10595232B2
公开(公告)日：2020-03-17
申请号：US15616714
申请日：2017-06-07
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Yu-Nan Lin , Wei-Chi Lai , Shen-Chung Lee , Chung-Yao Chang , Wei-Hsuan Chang
IPC分类号： H04W28/22 , H04L12/825 , H04W74/08 , H04L1/00 , H04L12/811
摘要： This invention discloses a method for controlling a wireless communication device to transmit data packets. The method includes steps of: transmitting data packets; counting retry times of data packets in a predetermined time period and generating a result accordingly; comparing said result with a predetermined value and generating a comparison result accordingly; and reducing transmission time of data packets according to said comparison result.

2. 发明授权

US11197201B2 Wireless communication device and method of controlling same 有权
公开(公告)号：US11197201B2
公开(公告)日：2021-12-07
申请号：US16736144
申请日：2020-01-07
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Yu-Nan Lin , Wei-Chi Lai , Shen-Chung Lee , Chung-Yao Chang , Wei-Hsuan Chang
IPC分类号： H04W28/22 , H04L12/825 , H04W74/08 , H04L1/00 , H04L12/811
摘要： This invention discloses a method for controlling a wireless communication device to reduce the number of retry times of data packets during transmission. The method includes steps of: using a first packet length to generate and transmit data packets; counting retry times of data packets in a predetermined time period and generating a result accordingly; and using a second packet length smaller than said first packet length to generate and transmit data packets when said result is greater than a predetermined value.

3. 发明授权

US10826541B2 Convolutional code decoder and convolutional code decoding method 有权
公开(公告)号：US10826541B2
公开(公告)日：2020-11-03
申请号：US16442604
申请日：2019-06-17
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Kuei-Cheng Chan , Chung-Yao Chang , Wei-Chieh Huang
IPC分类号： H03M13/03 , H03M13/41 , H03M13/29 , H03M13/00
摘要： The invention discloses a convolutional code decoder and a convolutional code decoding method. The convolutional code decoder performs decoding operation according to a received data and an auxiliary data to obtain a target data and includes an error detection data generation circuit, a channel coding circuit, a selection circuit, and a Viterbi decoding circuit. The error detection data generation circuit performs an error detection operation on the auxiliary data to obtain an error detection data. The channel coding circuit, coupled to the error detection data generation circuit, performs channel coding on the auxiliary data and the error detection data to obtain an intermediate data. The selection circuit, coupled to the channel coding circuit, generates a to-be-decoded data according to the received data and the intermediate data. The Viterbi decoding circuit, coupled to the selection circuit, decodes the to-be-decoded data to obtain the target data.

4. 发明授权

US10708032B2 Symbol timing determining device and method 有权
公开(公告)号：US10708032B2
公开(公告)日：2020-07-07
申请号：US16226926
申请日：2018-12-20
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Chuan-Hu Lin , Chung-Yao Chang
IPC分类号： H04L7/00 , H04L25/02 , H04L5/00 , H04W24/08 , H04L27/26 , H04W84/12
摘要： Disclosed is a symbol timing determining device including: a symbol timing detecting circuit detecting a reception signal to obtain a first symbol timing, and shifting the first symbol timing to obtain a second symbol timing; an estimation signal generating circuit processing the reception signal according to the first and the second symbol timings respectively, so as to obtain a first and a second channel estimation frequency-domain signals; a channel estimation impulse response signal generating circuit generating a first and a second channel estimation impulse response time-domain signals according to the first and the second channel estimation frequency-domain signals respectively; a power measuring circuit measuring the energy of the first and the second channel estimation impulse response time-domain signals according to a predetermined signal region respectively; and a decision circuit selecting one of the first and the second symbol timings according to a relation of the measured energy.

5. 发明授权

US10270558B2 Maximum likelihood detector and detecting method, and wireless signal receiver with maximum likelihood detection function 有权
公开(公告)号：US10270558B2
公开(公告)日：2019-04-23
申请号：US15465209
申请日：2017-03-21
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Chung-Yao Chang , Wei-Chieh Huang , Yi-Syun Yang
IPC分类号： H04L1/00 , H04L27/38 , H04L25/03 , H04L25/06
摘要： The present disclosure includes an ML (Maximum Likelihood) detector. An embodiment of the ML detector comprises a search value selecting circuit and an ML detecting circuit. The search value selecting circuit is configured to select a search value according to a communication index and a modulation type or determine the search value according to a predetermined value, in which the communication index is related to a reception signal or a derivative thereof, the search value is associated with a search range, and a number of candidate signal value(s) in the search range is not greater than a number of all candidate signal values of the modulation type. The ML detecting circuit is configured to execute an ML calculation according to the search value and one of the reception signal and the derivative thereof, so as to calculate a log likelihood ratio of every candidate signal value in the search range.

6. 发明授权

US09954647B2 Maximum likelihood detector and wireless signal receiver with maximum likelihood detection function 有权
公开(公告)号：US09954647B2
公开(公告)日：2018-04-24
申请号：US15465238
申请日：2017-03-21
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Chung-Yao Chang , Chuan-Hu Lin , Yi-Syun Yang
IPC分类号： H04L27/26 , H04L1/00 , H04L5/00 , H04L27/34
CPC分类号： H04L1/0054 , H04L5/0048 , H04L27/265 , H04L27/2695 , H04L27/34
摘要： The present invention discloses an ML (Maximum Likelihood) detector comprising: a search value selecting circuit selecting a first-layer search value; and an ML detecting circuit. The ML detecting circuit executes the following steps: selecting K first-layer candidate values according to the first-layer search value, one of a reception signal and a derivative thereof, and one of a channel estimation signal and a derivative thereof; calculating K second-layer candidate values according to the K first-layer candidate values; determining whether to add P second-layer supplemental candidate value(s) and generating a decision; when the decision is affirmative, adding the P second-layer supplemental candidate values, generating P first-layer supplemental candidate values according to the P second-layer supplemental candidate values, and calculating log likelihood ratios (LLRs) according to the (K+P) first-layer and (K+P) second-layer candidate values; and when the decision is negative, calculating LLRs according to the K first-layer and K second-layer candidate values.

7. 发明授权

US09893841B2 Wireless signal receiver with maximum likelihood detector 有权
公开(公告)号：US09893841B2
公开(公告)日：2018-02-13
申请号：US15465249
申请日：2017-03-21
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Chung-Yao Chang , Chuan-Hu Lin , Yi-Syun Yang
IPC分类号： H04L1/00 , H04L5/00 , H04L25/03 , H04B7/0413
CPC分类号： H04L1/0054 , H04B7/0413 , H04L25/022 , H04L25/03006 , H04L25/067
摘要： The present invention discloses an ML (Maximum Likelihood) detector. An embodiment of the ML detector comprises a search value selecting circuit and an ML detecting circuit. The search value selecting circuit is configured to select a first-layer search value. The ML detecting circuit is configured to carry out the following steps: selecting first-layer candidate values according to the first-layer search value, one of a reception signal and a derivative thereof, and one of a channel estimation signal and a derivative thereof, and adding one or more first-layer candidate value(s), if necessary; calculating second-layer candidate values according to all the above-mentioned first-layer candidate values, and adding one or more second-layer candidate value(s) and its/their corresponding first-layer candidate value(s), if necessary; and calculating log likelihood ratios according to the whole first-layer and second-layer candidate values.

8. 发明授权

US09713037B2 Wireless communication device and method of determining transmission rate of wireless communication device 有权
公开(公告)号：US09713037B2
公开(公告)日：2017-07-18
申请号：US14462905
申请日：2014-08-19
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Wei-Hsuan Chang , Chung-Yao Chang
IPC分类号： H04W28/22 , H04L12/811 , H04L12/825 , H04W74/08 , H04W28/04
CPC分类号： H04W28/22 , H04L47/25 , H04L47/38 , H04W74/0816 , H04W74/0825 , H04W74/085 , H04W74/0858
摘要： This invention discloses a wireless communication device and a method of determining a target set of transmission rates of the wireless communication device. The wireless communication device transmits data packets according to a plurality of transmission rates included in the target set of transmission rates. The method includes steps of: providing a plurality of candidate sets of transmission rates; transmitting a plurality of data packets according to a primary set of transmission rates; counting retry times of the data packets in a predetermined period of time and generating a counting result; and selecting one of the candidate sets of transmission rates according to the counting result to be the target set of transmission rates.

9. 发明授权

US10720944B2 Convolutional code decoder and convolutional code decoding method 有权
公开(公告)号：US10720944B2
公开(公告)日：2020-07-21
申请号：US16443003
申请日：2019-06-17
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Kuei-Cheng Chan , Chung-Yao Chang , Wei-Chieh Huang
IPC分类号： G06F7/02 , H03M13/00 , H03M13/29 , H03M13/41 , H04L29/08
摘要： The invention discloses a convolutional code decoder and a convolutional code decoding method. The convolutional code decoder and the convolutional code decoding method of the present invention perform decoding using predictive information, and therefore can demodulate/decode signals more quickly. Earlier completion of demodulation/decoding of signals can terminate the operation earlier and thereby achieve the effect of power savings. The convolutional code decoder performs decoding according to received data and auxiliary data to obtain target data, and includes a first error detection data generation circuit, a channel coding circuit, a first selection circuit, a first Viterbi decoding circuit, a second error detection data generation circuit, a comparison circuit, a second selection circuit, and a second Viterbi decoding circuit.

10. 发明授权

US09473962B2 Wireless transmission rate adjustment method 有权
标题翻译：无线传输速率调整方法
公开(公告)号：US09473962B2
公开(公告)日：2016-10-18
申请号：US14095679
申请日：2013-12-03
申请人： REALTEK SEMICONDUCTOR CORPORATION
发明人： Chien-Wei Hsin , Wei-Hsuan Chang , Chung-Yao Chang
IPC分类号： H04W24/06 , H04W72/08
CPC分类号： H04W24/06 , H04W72/085
摘要： The present invention discloses a wireless transmission rate adjustment method for adjusting the wireless transmission rate of a wireless transmission device. The method comprises: having the wireless transmission device enter a try state from a normal state; under the try state, transmitting a plurality of test packets according to a first modulation and coding scheme (MCS) and determining whether the transmission is successful in accordance with a predetermined condition; if the transmission is successful with the first MCS, returning to the normal state and transmitting data with the first MCS; if the transmission is unsuccessful with the first MCS, staying in the try state and transmitting a plurality of test packets according to a second MCS, and then determining whether the transmission is successful in accordance with the predetermined condition; if the transmission is successful with the second MCS, returning to the normal state and transmitting data with the second MCS; and if the transmission is failed with the second MCS, returning to the normal state and transmitting data at an original transmission rate or with the first MCS.
摘要翻译：本发明公开了一种用于调整无线传输设备的无线传输速率的无线传输速率调整方法。该方法包括：使无线传输设备从正常状态进入尝试状态; 在尝试状态下，根据第一调制和编码方案（MCS）发送多个测试分组，并根据预定条件确定传输是否成功; 如果传输成功与第一个MCS，返回到正常状态并用第一个MCS发送数据; 如果传输不成功与第一MCS，保持在尝试状态并根据第二MCS发送多个测试分组，然后根据预定条件确定传输是否成功; 如果传输成功与第二MCS，则返回正常状态并用第二MCS发送数据; 并且如果传输与第二MCS发生故障，则返回到正常状态并以原始传输速率或与第一MCS发送数据。

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