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pro vyhledávání: '"Mollén, Christopher"'
This paper studies a two-layer decoding method that mitigates inter-cell interference in multi-cell Massive MIMO systems. In layer one, each base station (BS) estimates the channels to intra-cell users and uses the estimates for local decoding on eac
Externí odkaz:
http://arxiv.org/abs/1903.07135
Autor:
Mollén, Christopher
Massive MIMO (multiple-input–multiple-output) is a multi-antenna technology for cellular wireless communication, where the base station uses a large number of individually controllable antennas to multiplex users spatially. This technology can prov
Externí odkaz:
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-143455
Autor:
Mollén, Christopher
Massive MIMO (Multiple-Input Multiple-Output) base stations have proven, both in theory and in practice, to possess many of the qualities that future wireless communication systems will require. They can provide equally high data rates throughout the
Externí odkaz:
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-130516
Massive multiple-input--multiple-output (MIMO) systems can suffer from coherent intercell interference due to the phenomenon of pilot contamination. This paper investigates a two-layer decoding method that mitigates both coherent and non-coherent int
Externí odkaz:
http://arxiv.org/abs/1807.08071
In massive MIMO base stations, power consumption and cost of the low-noise amplifiers (LNAs) can be substantial because of the many antennas. We investigate the feasibility of inexpensive, power efficient LNAs, which inherently are less linear. A pol
Externí odkaz:
http://arxiv.org/abs/1712.09612
The distortion from massive MIMO (multiple-input--multiple-output) base stations with nonlinear amplifiers is studied and its radiation pattern is derived. The distortion is analyzed both in-band and out-of-band. By using an orthogonal Hermite repres
Externí odkaz:
http://arxiv.org/abs/1711.02439
Publikováno v:
IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), New Orleans, Mar. 2017, pp. 6488-6492
The high hardware complexity of a massive MIMO base station, which requires hundreds of radio chains, makes it challenging to build commercially. One way to reduce the hardware complexity and power consumption of the receiver is to lower the resoluti
Externí odkaz:
http://arxiv.org/abs/1611.05723
Autor:
Mollén, Christopher, Larsson, Erik G., Gustavsson, Ulf, Eriksson, Thomas, Heath Jr, Robert W.
Co-existing wireless systems, which share a common spectrum, need to mitigate out-of-band (OOB) radiation to avoid excessive interference. For legacy systems, OOB radiation is well understood and is commonly handled by digital precompensation techniq
Externí odkaz:
http://arxiv.org/abs/1611.01359
Publikováno v:
IEEE Transactions on Wireless Communications, vol. 16, no. 1, pp. 87-100, Jan. 2017
Analog-to-digital converters (ADCs) stand for a significant part of the total power consumption in a massive MIMO base station. One-bit ADCs are one way to reduce power consumption. This paper presents an analysis of the spectral efficiency of single
Externí odkaz:
http://arxiv.org/abs/1602.07364
Autor:
Mollén, Christopher
Storskaliga fleranvändar-MIMO-system, med hundratals basstationsantenner, studeras med allt större intresse både inom akademin och industrin. En anledning är att sådana system kan betjäna flera enantennsanvändare samtidigt över samma tids-fre
Externí odkaz:
http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-94627