Performance of switched-beam smart antennas for cellular radio systems

Ho, Ming-Ju; Stuber, G.L.; Austin, M.D.

doi:10.1109/25.661027

Cited by 79 publications

(9 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the SB scheme, switched-beam assisted beam-processing schemes, which switch the transmission beam to the next after transmission for a given duration of time using a beam, have been intensively studied in recent years [15]. In the switched-beam schemes, however, there is much probability of an incorrect beam selection, when a strong interference exists in the direction of the transmission.…”

Section: S I N G L E -Beam S C H E M Ementioning

confidence: 99%

“…The average path loss for a transmitter-to-receiver (T-R) distance of f is expressed as P L( f ) in (14) and (15). Finally, in (15) N 0 denotes the single-sided power spectral density of the additive white Gaussian noise (AWGN).…”

Section: Downlink Average Sinr Expressionsmentioning

confidence: 99%

“…where P M represents the transmitted power by one of the K beams of the MS, and the details of the other variables are referred to the explanations associated with (14) and (15).…”

Section: Uplink Average Sinr Expressionsmentioning

confidence: 99%

See 2 more Smart Citations

Performance Analysis of Distributed-Antenna Communication Systems Using Beam-Hopping Under Strong Directional Interference

Zhu

2005

Wireless Pers Commun

View full text Add to dashboard Cite

In order to efficiently mitigate the interference of directional jammers, we investigate a beam-hopping (BH) communication scheme, which includes slow beam-hopping (SBH) and fast beam-hopping (FBH) schemes. In the BH communication scheme, only one pair of the beams is used for transmission and it hops from one to the next according to an assigned BH pattern. In this contribution, a range of expressions in terms of the symbol error rate (SER) performance of the BH and conventional single-beam (SB) schemes have been derived, when both the downlink and uplink are considered. The SER performance of the BH scheme is compared with that of the SB scheme, for M-ary phase-shift keying (MPSK) and M-ary quadrature amplitude modulation (MQAM) signals under composite log normal shadowing/Nakagami-m fading channels. Our analysis and results show that the proposed BH scheme is suitable for communications, when several distributed antenna arrays are available around a mobile.

show abstract

Section: S I N G L E -Beam S C H E M Ementioning

confidence: 99%

Section: Downlink Average Sinr Expressionsmentioning

confidence: 99%

See 1 more Smart Citation

Performance Analysis of Distributed-Antenna Communication Systems Using Beam-Hopping Under Strong Directional Interference

Zhu

2005

Wireless Pers Commun

View full text Add to dashboard Cite

show abstract

“…In the MB scheme switched-beam assisted beamprocessing schemes are widely used, which switch the transmission beam to the next after transmission for a given duration of time using a beam [18]. When using switched-beam assisted beam-processing, however the probability of an incorrect beam selection is likely to be high, when there is a strong interference in the direction of the transmission.…”

Section: Multiple-beam Schemementioning

confidence: 99%

Performance evaluation of distributed‐antenna communications systems using beam‐hopping

Zhu

Yang

2005

Wireless Communications

View full text Add to dashboard Cite

SummaryDigital beamforming (DBF) techniques are capable of improving the performance of communications systems significantly. However, if the transmitted signals are conflicted with strong interference especially in the direction of the transmitted beams, these directional jamming signals will severely degrade the system performance. In order to efficiently mitigate the interference of the directional jammers, in this contribution a beam-hopping (BH) communications scheme is studied. In the BH communications scheme, only one pair of the beams is used for transmission and it hops from one to the next according to an assigned BH pattern. In this contribution, a range of expressions in terms of the average signal to interference plus noise ratio (SINR) performance have been derived, when both the uplink and downlink are considered. The average SINR performance of the BH scheme and that of the conventional single-beam (SB) as well as multiple-beam (MB) assisted beam-processing schemes have been investigated. Our analysis and results show that the BH scheme is capable of efficiently combating the directional jamming, with the aid of utilizing the directional gain of the beams generated by both the transmitter and the receiver. Furthermore, the BH scheme is capable of reducing the intercept probability of the communications. Therefore, the BH scheme is suitable for communications when several distributed antenna arrays are available around a mobile.

show abstract

“…Although CP microstrip-based antennas are low-profile, they, however, have a high-Q that results in low impedance bandwidth and 3-dB axialratio (AR) bandwidth (ARBW) [1]. CP can be implemented using various types of antenna such as microstrip patch antenna [2], spiral antenna [3], dielectric resonator antenna [4], and slot antenna [5]. Attributes of such circularly polarized square slot antenna (CPSSA) include: (i) broadband performance; (ii) construction on a single layer for low cost production; (iii) low profile; and (iv) compatibility for integration with MIC and MMIC technologies.…”

Section: Introductionmentioning

confidence: 99%

A compact 4 × 4 butler matrix on double‐layer substrate

Ausordin

Rahim

Seman

et al. 2013

Micro & Optical Tech Letters

View full text Add to dashboard Cite

A novel 4 3 4 Butler matrix (BM) on double-layer substrate is presented. The design of the multilayered BM configuration successfully removes the need for a crossover component by utilizing a double-layer substrate structure. With the elimination of the crossover, space consumption by the microwave circuit of the BM is reduced significantly. The BM is developed by means of four proposed 3-dB compact couplers using dual transmission lines on a double-layer substrate and two 45 phase shifters. The proposed BM components are designed using CST Microwave Studio 2010 and fabricated using inexpensive FR-4 substrate to operate at 2.45 GHz. The simulated and measured performances in terms of S-parameters and phase differences for each 3 dB coupler, 45 phase shifter, and BM are presented. Good agreement in beam direction results between the MATLAB (matrix laboratory) simulator and measurement is accomplished with a deviation of 68 .

show abstract

Performance of switched-beam smart antennas for cellular radio systems

Cited by 79 publications

References 15 publications

Performance Analysis of Distributed-Antenna Communication Systems Using Beam-Hopping Under Strong Directional Interference

Performance Analysis of Distributed-Antenna Communication Systems Using Beam-Hopping Under Strong Directional Interference

Performance evaluation of distributed‐antenna communications systems using beam‐hopping

A compact 4 × 4 butler matrix on double‐layer substrate

Contact Info

Product

Resources

About