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- IQ_imbalance abstract "IQ imbalance is a performance-limiting issue in the design of direct conversion receivers, also known as zero intermediate frequency (IF) or homodyne receivers. Such a design translates the received radio frequency (RF, or passband) signal directly from the carrier frequency (fc) to baseband using only one mixing stage. The traditional heterodyne receiver structure needs an intermediate-frequency (IF) stage between the RF and baseband signals. The direct conversion receiver structure does not have an IF stage, and does not need an image rejection filter. Due to the lower component count, it is easier to integrate. However, a direct-conversion RF front-end suffers from two major drawbacks: one is IQ imbalance and the other is DC offset. When designing a homodyne receiver, control of IQ imbalance is necessary to limit signal demodulation error.IQ imbalances occur due to mismatches between the parallel sections of the receiver chain dealing with the in-phase (I) and quadrature (Q) signal paths. The local oscillator (LO) generates a sinewave, and a copy of that sinewave that is delayed by 90 degrees. When the direct LO output is mixed with the original signal, this produces the I signal, whereas when the delayed LO output is mixed with the original signal, that produces the Q signal. In the analog domain, the delay is never exactly 90 degrees. Similarly, analog gain is never perfectly matched for each of the signal paths.".
- IQ_imbalance wikiPageID "47085706".
- IQ_imbalance wikiPageLength "12637".
- IQ_imbalance wikiPageOutDegree "55".
- IQ_imbalance wikiPageRevisionID "682267082".
- IQ_imbalance wikiPageWikiLink Baseband.
- IQ_imbalance wikiPageWikiLink Center_frequency.
- IQ_imbalance wikiPageWikiLink Complex_conjugate.
- IQ_imbalance wikiPageWikiLink DC_bias.
- IQ_imbalance wikiPageWikiLink DC_offset.
- IQ_imbalance wikiPageWikiLink Decibel.
- IQ_imbalance wikiPageWikiLink Demodulation.
- IQ_imbalance wikiPageWikiLink Direct-conversion_receiver.
- IQ_imbalance wikiPageWikiLink Direct_conversion_receiver.
- IQ_imbalance wikiPageWikiLink Electronic_oscillator.
- IQ_imbalance wikiPageWikiLink Frequency_domain.
- IQ_imbalance wikiPageWikiLink In-phase_and_quadrature_components.
- IQ_imbalance wikiPageWikiLink Local_oscillator.
- IQ_imbalance wikiPageWikiLink Low-pass_filter.
- IQ_imbalance wikiPageWikiLink MIMO.
- IQ_imbalance wikiPageWikiLink MIMO-OFDM.
- IQ_imbalance wikiPageWikiLink OFDM.
- IQ_imbalance wikiPageWikiLink Orthogonal_frequency-division_multiple_access.
- IQ_imbalance wikiPageWikiLink Orthogonal_frequency-division_multiplexing.
- IQ_imbalance wikiPageWikiLink Passband.
- IQ_imbalance wikiPageWikiLink Quadrature_phase.
- IQ_imbalance wikiPageWikiLink RF.
- IQ_imbalance wikiPageWikiLink Radio_frequency.
- IQ_imbalance wikiPageWikiLink Receiver_(radio).
- IQ_imbalance wikiPageWikiLink Signal-to-noise_ratio.
- IQ_imbalance wikiPageWikiLink Signal_(electrical_engineering).
- IQ_imbalance wikiPageWikiLink Sine_wave.
- IQ_imbalance wikiPageWikiLink Single-input_single-output_system.
- IQ_imbalance wikiPageWikiLink Sinusoidal.
- IQ_imbalance wikiPageWikiLink Subcarrier.
- IQ_imbalance wikiPageWikiLink Subcarriers.
- IQ_imbalance wikiPageWikiLink Time-domain.
- IQ_imbalance wikiPageWikiLink Time-invariant_system.
- IQ_imbalance wikiPageWikiLink Time_domain.
- IQ_imbalance wikiPageWikiLinkText "IQ imbalance".
- IQ_imbalance hasPhotoCollection IQ_imbalance.
- IQ_imbalance wikiPageUsesTemplate Template:Uncategorized.
- IQ_imbalance hypernym Issue.
- IQ_imbalance type WrittenWork.
- IQ_imbalance comment "IQ imbalance is a performance-limiting issue in the design of direct conversion receivers, also known as zero intermediate frequency (IF) or homodyne receivers. Such a design translates the received radio frequency (RF, or passband) signal directly from the carrier frequency (fc) to baseband using only one mixing stage. The traditional heterodyne receiver structure needs an intermediate-frequency (IF) stage between the RF and baseband signals.".
- IQ_imbalance label "IQ imbalance".
- IQ_imbalance wasDerivedFrom IQ_imbalance?oldid=682267082.
- IQ_imbalance isPrimaryTopicOf IQ_imbalance.