Optical fiber feeder for microcellular mobile communication systems (H-O15)

Shibutani, M.; Kanai, T.; Domom, W.; Emura, W.; Namiki, J.

doi:10.1109/49.233224

Cited by 47 publications

(11 citation statements)

References 16 publications

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“…On the other hand, advances in lightwave technologies, along with the availability of wide-bandwidth, very lowloss (around to 0.2 dB/km) fiber optic cables, enable the tranmission of radio signals between the CS and Micro-BS's without amplification for more than 20 km, using subcarrier multiplexing (SCM) [1], [7]. In this case, the Micro-BS would contain only an optoelectric (O/E) converter and power amplifier (PA) in the forward link, and a low-noise amplifier (LNA) and an electrooptic (E/O) converter in the reverse link, as shown in Fig.…”

Section: A Antenna Interconnection In Microcellular Systemsmentioning

confidence: 99%

“…In order to provide high-capacity, ubiquitous coverage, and to be able to support compact and lightweight wireless terminals, a very large number of cells should be deployed in urban areas; according to one estimate, more than 5000 cells would be required in the Tokyo metropolitan area [1]. Therefore, building an affordable infrastructure for the access network of PCS is a major challenge.…”

Section: Introductionmentioning

confidence: 99%

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Antenna interconnection strategies for personal communication systems

Yanıkömeroğlu

Sousa

1997

IEEE J. Select. Areas Commun.

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Abstract-Microcellular and distributed antenna systems are two promising candidates for implementing personal communication systems. In this paper, antenna interconnection strategies for these systems are studied in order to determine cost-efficient as well as robust and flexible architectures in hexagonal layouts. To this end, some results from minimal networks theory are used, in particular, those dealing with the problem of Steiner trees. The significant reduction in conduit and cable lengths that the Steiner minimal tree (SMT) architecture provides over the star type, especially in large networks, is demonstrated. It is further shown that the SMT architecture also provides more flexibility and robustness compared to the star type. The suboptimal, but easy-to-construct, minimal spanning tree (MST) architecture is given as well, and it is compared to the SMT and star types.

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Section: A Antenna Interconnection In Microcellular Systemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Antenna interconnection strategies for personal communication systems

Yanıkömeroğlu

Sousa

1997

IEEE J. Select. Areas Commun.

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show abstract

“…2 illustrates the difference between the product and inner product of two spreading codes; note that the former is a time function while the latter is a number. We also note that although (3) where , and denote some arbitrary delays (4) for ; but rather, the left-hand side in (4) depends on the actual values of and . Now, let be the interference component (after despreading) at the branch of the MRC of , due to , corresponding to AE (5) …”

Section: Correlation Coefficient Analysis For Two Aes With Two Usersmentioning

confidence: 99%

“…It is important to note that there is a potential for an additional gain when multiple AEs are utilized since more energy 4 It can even intuitively be stated that the required power control dynamic range will be less in a multi-antenna system [9], [10], therefore, the implementation of such distributed power control algorithms is expected to be more feasible. 5 Although microdiversity can be realized in various ways, in this paper it refers to the particular realization with multiple receiving AEs.…”

Section: B Antenna Gain Against Interference Versus Diversity Gain Amentioning

confidence: 99%