摘要:
A method (200) of bias cancellation for a radio channel sequence includes: receiving (201) a radio signal, the radio signal comprising a radio channel sequence coded by a first signature, the first signature belonging to a set of orthogonal signatures; decoding (202) the radio channel sequence based on the first signature to generate a decoded radio channel sequence; decoding (203) the radio channel sequence based on a second signature, wherein the second signature is orthogonal to the signatures of the set of orthogonal signatures, to generate a bias of the radio channel sequence; and canceling (204) the bias of the radio channel sequence from the decoded radio channel sequence.
摘要:
A communication device is provided that includes a receiver configured to receive a radio frequency signal. The communication device further includes a processor configured to determine a shift frequency based on a component radio frequency signal. The processor is configured to determine a second signal based on the radio frequency signal. The component radio frequency signal is dependent from the radio frequency signal and associated with a frequency related to the radio frequency signal represented in the frequency domain. The second signal is determined from shifting frequencies related to the radio frequency signal represented in the frequency domain by the shift frequency.
摘要:
A communication terminal is described with a controller configured to receive, from applications, respective requests for an exchange of application layer data over a communication network associated with the respective application, to select a first application, to control a communication circuit to perform an exchange according to the request received from the first application, to initiate, for a second application, a buffering of application layer data requested to be exchanged according to the request received from the second application, to control the communication circuit to release the first network layer communication connection based on a duration of the buffering and to establish a second network layer communication connection to a communication network associated with the second application and perform an exchange according to the request received from the second application over the second network layer communication connection after release of the first network layer communication connection.
摘要:
A method (200) of bias cancellation for a radio channel sequence includes: receiving (201) a radio signal, the radio signal comprising a radio channel sequence coded by a first signature, the first signature belonging to a set of orthogonal signatures; decoding (202) the radio channel sequence based on the first signature to generate a decoded radio channel sequence; decoding (203) the radio channel sequence based on a second signature, wherein the second signature is orthogonal to the signatures of the set of orthogonal signatures, to generate a bias of the radio channel sequence; and canceling (204) the bias of the radio channel sequence from the decoded radio channel sequence.
摘要:
Soft combining in a CoMP or Soft Handover receiver. Usually soft combining implies Maximum Ratio Combining of the per cell equalizer outputs (the demodulated complex symbols). The resulting soft combined complex symbol is then demapped to a produce soft bits, ie Log Likelihood Ratio LLR for each bit. This however is not optimal (noise between cells is correlated) and implies the same equalizer structure per cell as well as a lengthy buffer to align the cells' symbols. It is therefore proposed there to have soft bit combining, ie the LLR of each cell's bits are added together (real values). Per cell synchronization is done as part of the soft bit combining, reducing the buffer length. Each cell path can thereby have its own different equalizer algorithm. A further embodiment further postpone the soft combining at the channel decoder level by replacing the addition of soft bits by non-linear algorithms.
摘要:
An equalizer (400) includes: a channel estimator (401) configured to generate a set of time-domain channel coefficients (402) based on a receive signal (202); a frequency-domain transformer (403) configured to generate a set of frequency-domain channel coefficients (404) based on a frequency transform of the set of time-domain channel coefficients (402); an equalizer coefficient generator (405) configured to generate a set of frequency-domain equalizer coefficients (406) based on the set of frequency-domain channel coefficients (404); a time-domain transformer (407) configured to generate a set of time-domain equalizer coefficients (408) based on a time transform of the set of frequency-domain equalizer coefficients (406); and a filter (411) configured to filter the receive signal (202) based on a filter function that is based on the set of time-domain equalizer coefficients (408).
摘要:
A transmitter and method for transmitting a communication signal having at least a first carrier and a second carrier. The transmitter includes a scaling factor estimator configured to estimate a first power scaling factor for the first carrier and a second power scaling factor for the second carrier; and a gain controller configured to adjust at least one of a power of the first carrier based on the first power scaling factor and a power of the second carrier based on the second power scaling factor, wherein a sum of the adjusted powers of the first and second carriers is less than or equal to a maximum transmission power, and a power imbalance between the adjusted powers of the first and second carriers is less than or equal to a maximum power imbalance.