Abstract:
An apparatus for capturing a signal of interest, e.g., PSS and/or SSS, captures data transmitted by a WWAN for each of a plurality of communication frames. The data is captured for a capture length corresponding to a duration less than a periodicity of transmission of the signal of interest. Data is captured with a WLAN receive chain, and each capture occurs at a different point within its respective communication frame relative to other communication frames. The apparatus processes the plurality of data captures to form an equivalent continuous data corresponding to a duration greater than the periodicity of transmission. Because the continuous data has a duration greater than the periodicity of transmission of the signal of interest, the signal of interest is contained in the captured data, and PSS and/or SSS can be detected.
Abstract:
Methods, systems, and devices are disclosed for configuring maximum allowed transmit power for wireless communications systems. Some embodiments treat multiple traffic types, such as voice traffic and data traffic, separately with respect to one or more maximum allowed transmit power limits. In some cases, at least first transmit power limit for at least a first traffic type and/or at least a second transmit power limit for at least a second traffic type may be determined. At least the first transmit power limit with respect to the first traffic type or the second transmit power limit with respect to the second traffic type may be utilized. Some embodiments are configured to utilize flexible bandwidth carriers.
Abstract:
Methods, systems, and devices are provided that may address problems pertaining to effective transmit power control of a communications device operating in a wireless communications system. Some embodiments utilize mechanisms or techniques with dynamically adaptive steps sizes for transmit power control based on one or more trends. Some of these techniques may identify a trend in the transmit power control (TPC) commands and may adapt a TPC step size as a result. Other techniques may be utilized in which transmit power control is based on multiple interference estimates in a frame slot. Having multiple interference estimates at sub-slot intervals may provide additional transmit power control by allowing more transmit power adjustments, or more appropriate adjustments, for each slot. Metric calculations may be performed on one or more techniques to determine appropriate TPC operations.
Abstract:
A time period associated with each of a plurality of tasks included in a current instance of WWAN data capture/processing by a WLAN processor and a WWAN processor is determined. A total time period comprising the respective time periods of each task is compared to an overall time budget criterion to obtain a comparison outcome. A change in at least one of the tasks based on the comparison outcome is implemented. The change results in an adjustment of the total time period associated with a next instance of WWAN data capture/processing by the WLAN processor and the WWAN processor.
Abstract:
Methods, systems, and devices are provided that may address problems pertaining to effective transmit power control of a communications device operating in a wireless communications system. Some embodiments utilize mechanisms or techniques with dynamically adaptive steps sizes for transmit power control based on one or more trends. Some of these techniques may identify a trend in the transmit power control (TPC) commands and may adapt a TPC step size as a result. Other techniques may be utilized in which transmit power control is based on multiple interference estimates in a frame slot. Having multiple interference estimates at sub-slot intervals may provide additional transmit power control by allowing more transmit power adjustments, or more appropriate adjustments, for each slot. Metric calculations may be performed on one or more techniques to determine appropriate TPC operations.
Abstract:
Data samples of a signal transmitted by a WWAN are captured during a first set of capture ticks for a first capture period defined by a plurality of contiguous ticks. The first set of capture ticks comprises a first subset of the plurality of contiguous ticks, and the capturing is done using a WLAN receive chain having a switchable LNA gain state. The capturing of data samples is repeated for at least one additional capture period defined by a plurality of contiguous ticks to capture data samples during at least one additional set of capture ticks comprising an additional subset of the plurality of contiguous ticks for which data samples were not previously captured. The LNA gain state of the WLAN receive chain is switched at least once over the plurality of capture periods. Gain state switching may occur a capture period, or between capture periods.
Abstract:
A plurality of data samples are captured during a single capture period using a WLAN receive chain, wherein the data samples include a signal of interest periodically transmitted by a WWAN. A preferred LNA gain state is selected from among a plurality of available LNA gain states for the WLAN receive chain. The plurality of gain states may be a discrete set of LNA gain states or may be a set of LNA gain states derived from energy measurements. The LNA gain state of the WLAN receive chain is set to the selected LNA gain state and data samples are captured during each of a plurality of contiguous capture ticks within a capture period. The captured data samples are processed to detect for the signal of interest.
Abstract:
An apparatus for capturing a signal of interest, e.g., PSS and/or SSS, captures data transmitted by a WWAN by obtaining access to a WLAN receive chain for a period of time corresponding to a measurement gap. The signal of interest transmitted by the WWAN is captured during the measurement gap using the WLAN receive chain. Access to a WLAN receive chain may be obtained in any one of several ways. For example, access may be obtained by 1) requesting WLAN receive chain access for LTE measurements through a virtual flow, 2) entering into a power save mode, 3) tuning to a non-operating WLAN channel, 4) setting network allocation vector (NAV) at or above a threshold value, or 5) entering a measurement mode during which the WLAN receive chain is prevented from performing WLAN operations.
Abstract:
An apparatus for wireless communication obtains a first metric of a cell based on signals received by a WWAN radio tuned to a common frequency, and a second metric of the cell based on signals received by a WLAN radio tuned to the common frequency. The apparatus determines a calibration factor based on the first and second metrics, and performs cell search and cell measurement based on the calibration factor and signals received by the WLAN radio tuned to a target frequency. The common frequency may be a serving frequency of the WWAN, in which case the first and second metrics are one of frequency or power metrics and the calibration factor is one of a frequency offset and a power offset. The common frequency may also be a target frequency for inter-frequency measurements of the WWAN, in which case the calibration factor is based primarily on power measurements.
Abstract:
Various aspects described herein relate to providing analog interference cancelation in a shared antenna. A plurality of signals can be obtained at a plurality of reference points in a transmitter chain of a shared antenna. At least one reference point of the plurality of reference points from which to generate a cancelation signal and/or at least one injection point for injecting the cancelation signal can be selected based at least in part on expected analog interference cancelation metrics related to each of the plurality of reference points and/or the at least one injection point. The cancelation signal can be generated based at least in part on the at least one reference point and/or injection point. The cancelation signal can be injected in the injection point at a receiver chain of the shared antenna to cancel interference from signals generated at the transmitter chain of the shared antenna.