摘要:
An antenna system for a portable transceiver device comprises an antenna structure for transmitting and receiving RF signals. The antenna structure includes multiple feeding ports having a common structure fully coupling multiple antennas together. This antenna structure is made of a conductor that can be surface mounted over a nonplanar surface. When the conductor is mounted on a nonplanar surface, the antenna structure extends in three dimensional space around the portable communications device.
摘要:
A method for processing a preamble of a data unit received via a communication channel, wherein the preamble includes a first preamble field having a plurality of repetitions of a sequence, includes generating a cross-correlation output signal at least in part by correlating (i) a signal corresponding to the first preamble field of a received data unit with (ii) one or more repetitions of the sequence. The method also includes generating a correlation output signal at least in part by performing a correlation operation on the cross-correlation output signal, and, based at least in part on the correlation output signal, detecting the received data unit and/or determining timing associated with the received data unit.
摘要:
In a code tracking loop, a multipath discriminator is configured to generate a first tracking error corresponding to a received signal in the presence of multipath interference and/or at low signal level. A line-of-sight (LOS) discriminator is configured to generate a second tracking error corresponding to the received signal. A multipath switch is configured to i) detect the presence of multipath interference in the received signal and/or a low signal level of the received signal compared to a threshold, and ii) indicate whether the first tracking error or the second tracking error is to be utilized.
摘要:
A test method is for determining RF sensitivity of an RF receiver for a plurality of channels extending over a frequency band(s) using an RF source coupled to the RF receiver by an RF communications link. The plurality of channels may include channels having a predictable RF sensitivity and a channel(s) having a non-predictable RF sensitivity. The test method may include measuring an RF sensitivity for one or more of the channels having the predictable RF sensitivity, and generating a partial RF sensitivity function for the channels having the predictable RF sensitivity based thereon. The method may further include measuring an RF sensitivity for the channel(s) having the non-predictable RF sensitivity. Additionally, an overall RF sensitivity function may be generated for the plurality of channels based upon the partial RF sensitivity function, and based upon the measured RF sensitivity for the channel(s) having the non-predictable RF sensitivity.
摘要:
An antenna and a wireless mobile communication device incorporating the antenna are provided. The antenna includes a first conductor section electrically coupled to a first feeding point, a second conductor section electrically coupled to a second feeding point, and a near-field radiation control structure adapted to control characteristics of near-field radiation generated by the antenna. Near-field radiation control structures include a parasitic element positioned adjacent the first conductor section and configured to control characteristics of near-field radiation generated by the first conductor section, and a diffuser in the second conductor section configured to diffuse near-field radiation generated by the second conductor section into a plurality of directions.
摘要:
In one embodiment, a mobile communication device comprises a first antenna; a second antenna; and a controller, based on a detected obstruction, for selecting one of said first antenna or said second antenna.
摘要:
A test method is for determining RF sensitivity of an RF receiver for a plurality of channels extending over a frequency band(s) using an RF source coupled to the RF receiver by an RF communications link. The plurality of channels may include channels having a predictable RF sensitivity and a channel(s) having a non-predictable RF sensitivity. The test method may include measuring an RF sensitivity for one or more of the channels having the predictable RF sensitivity, and generating a partial RF sensitivity function for the channels having the predictable RF sensitivity based thereon. The method may further include measuring an RF sensitivity for the channel(s) having the non-predictable RF sensitivity. Additionally, an overall RF sensitivity function may be generated for the plurality of channels based upon the partial RF sensitivity function, and based upon the measured RF sensitivity for the channel(s) having the non-predictable RF sensitivity.
摘要:
A first communication apparatus sequentially generates a pulse sequence having pulse signals arranged based on the UWB communication system, performs a framing process to form a frame having at least a preamble and a data portion on the generated pulse sequence and inserts a preamble segment including a sequence of steady pulse signals in the data portion at a predetermined time interval, and transmits it as a radio wave. A second communication apparatus receives a pulse sequence as a radio wave transmitted from the first communication apparatus, and detects at least the preamble segment from the frame contained in the received pulse sequence through a detection window structured to have a predetermined time length, whereby a transmission timing for the pulse sequence to the first communication apparatus 2 controlled according to a state of detection of the preamble segment.
摘要:
By using multiple antennas in a diversity arrangement, a mobile communication device is operable to automatically optimize the best antenna or antenna combination in reaction to the device's immediate environment. The individual antenna designs can be optimized to provide high antenna system efficiency for a number of likely device environments.
摘要:
An antenna and a wireless mobile communication device incorporating the antenna are provided. The antenna includes a first conductor section electrically coupled to a first feeding point, a second conductor section electrically coupled to a second feeding point, and a near-field radiation control structure adapted to control characteristics of near-field radiation generated by the antenna. Near-field radiation control structures include a parasitic element positioned adjacent the first conductor section and configured to control characteristics of near-field radiation generated by the first conductor section, and a diffuser in the second conductor section configured to diffuse near-field radiation generated by the second conductor section into a plurality of directions.